Fixed issue of invalid value gets update even if attribute has allowed values property.

Fixed issue of invalid value gets update even if attribute has allowed values property.

Other issues fixed:
1. Crash while editing resource properties when attribute's update automation is going on.
2. Update automation starts from previous state when resource is deleted and created with same properties as deleted one.

Change-Id: I0ab53a1ebc4b03fd4e7d281fed612ba1c1709268
Signed-off-by: Harish Kumara Marappa <h.marappa@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4231
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: RadhaBhavani <radha.p@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>