Adding OCRep destructor, various move activities

Adding OCRep destructor, various move activities

Apparently OCRepresentation's destructor was causing issues
in the JNI version.  Seemingly adding a virtual destructor to
the OCRepresentation is enough to cause this to go away.

Also adding move construction/assignment to our more expensive
types.

Change-Id: Icb3b6f25e268384b51126e18ec55fc5099c9b2f9
Signed-off-by: Erich Keane <erich.keane@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/305
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>