Update change log and spec for wrt-plugins-tizen_0.4.15

Update change log and spec for wrt-plugins-tizen_0.4.15

[Issue#] N/A
[Problem] Hidden bug for calendar date based find api if value is greater than 32 bit size.
[Cause] Use of 32 bit time format.
[Solution] Use 64 bit time format for find api date attributes.

[Issue#] N/A
[Problem] Wrong default rrule end date displayed.
[Cause] Wrong use of platform default value.
[Solution] Use platform default end date for rrule.

[Issue#] TREL-251
[Problem] progress value is not unsigned.
[Cause] N/A
[Solution] value type is changed unsigned type & using validator

[Issue#] N/A
[Problem] Oranage(Adelya) request
[Cause] N/A
[Solution] Add setExclusiveMode api

[Issue#] [Application] change error to exception & TCT bug fix
[Problem] N/A
[Cause] N/A
[Solution] change WebAPIError to WebAPIException and bug-fix for TCT

[Issue#] N/A
[Problem] One file is missed for previous upload
[Cause] N/A
[Solution] N/A
[SCMRequest] N/A

[Issue#] N/A
[Problem] It used WebapiError instead of WebapiException
[Cause] N/A
[Solution] Apply AWebapiException.

[Issue#] prevent 50655 50656 50690
[Problem] Had risk not to called destructor
[Cause] Freed void pointer
[Solution] Getting finalizer function from setter

[Issue#] N/A
[Problem] Privilege has been changed
[Cause] Policy has been changed
[Solution] Applied N/P

[Issue#] N/A
[Problem] Init function is called many times while deinit function is not called.
[Cause] DS manager destructor is not called when unit tc is run repetitively.
[Solution] Call init function only once if deinit function is not called.

[Issue#] N/A
[Problem] Apply Argument Validator & WebapiException & Unit TC
[Cause] N/A
[Solution] Apply Argument Validator & WebapiException for TCT Pass

[Issue#] N/A
[Problem] It used WebapiError instead of WebapiException
[Cause] N/A
[Solution] Apply AWebapiException.

[Issue#] Docomo request to access ringtones directory.
[Problem] N/A
[Cause] N/A
[Solution] virtual root addition.

[Issue#] N/A
[Problem] Fail TZDate.difference, equalsTo, ealierThan, laterThan
[Cause] It used WebapiError instead of WebapiException. When APIs to compare with another TZDate called, they compared with same objects.
[Solution] Apply AWebapiException. Fix to compare this obejct with another object.

[#Issue] N/A
[Problem] Argument checking rule was not valid
[Cause] Did not follow ECMAScript rule
[Solution] Used the common ArgumentValidator

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] Apply Argument Validator & WebapiException for TCT Pass

[Issue#] N/A
[Problem] When user input function object as callback interface, then any exception is thrown
[Cause] toCallbackObject() do not check whether input value is not function or not
[Solution] toCallbackObject throws TypeMismatchException in case of function object

[Issue#] N_SE-33433
[Problem] Wrong child record update routine for calendar alarms and attendees.
[Cause] Didn't delete preset records.
[Solution] Delete preset records before updating child records.

[Issue#] TREL-161
[Problem] TCT failed
[Cause] Validation check problem
[Solution] Fixed validation codes

[Issue#] N/A
[Problem] Exception type is wrong
[Cause] Used JSWebAPIError
[Solution] Use JSWebAPIException class

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [Messaging] JSMessageBody - ArgumentValidator

[Issue#] N/A
[Problem] Crash when addDraftMessage with Email message on sms service
[Cause] call addDraft on sms with email message
[Solution] check the message type and service type

[Issue#] N/A
[Problem] [Contact] fix prevent issues
[Cause] internal error
[Solution] modify code

[Issue#] DCM-1285
[Problem] releaseDate return undefined currently.
[Cause] N/A
[Solution] return value chagned as an result

[Issue#] N/A
[Problem] Invalid array attribute not checked.
[Cause] No array type check.
[Solution] Check array type in converter for TCT pass.

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution]  [Download] Fix WebAPIError to WebAPIException for each operation.
[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [CallHistory] Applied ArgumentValidator and fixed unit TC.

[Issue#] N/A
[Problem] Wrong duratoin value conversion for a large value.
[Cause] Duration value converted using integer type.
[Solution] Use long long type instead of integer.

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [Common] Use WebAPIException in PlatformException

[Issue#] N/A
[Problem] ArgumentValidator on JSMessagingService, JSMessagingServiceManager, JSMessagingStorage.
[Cause] N/A
[Solution] ArgumentValidator on JSMessagingService, JSMessagingServiceManager, JSMessagingStorage.

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [Common] Support to JSWebAPIException

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [SecureElement] Applying the ArgumentValidator

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] return shared directory URI for specific application

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [TimeUtil] Applying the ArgumentValidator

[Issue#] N/A
[Problem] Conversion exception for a task without start time.
[Cause] Wrong duration calculation for a task without start time.
[Solution] Set null duration for a task without a start time.

[Issue#] CID 50664
[Problem] Dereferencing after null check
[Cause] N/A
[Solution] Fix a bug

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] [Common] ArgumentValidator fix conversion bug , add JSUtil helper functions (merging missing changes from refactoring branch)