Java API implementation for changes in simulator resource model.

Java API implementation for changes in simulator resource model.

1. Seperated AttributeProperty from SimulatorResourceModel.
2. Implemented different types of attribute property classes and their
   corresponding validation classes and made necessary changes in other classes
   according to these changes.

Change-Id: I4d4b51eeeceb4be17a6e519dd602b0de8ebfe0d3
Signed-off-by: G S Senthil Kumar <senthil.gs@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4955
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Radha Bhavani <radha.p@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>