BUG-730 : added tests for Encoders/Decoders in PCEP.

Change-Id: I07fca73a415f78c7f3e15f5522ea22efbccb44fd
Signed-off-by: Dana Kutenicsova <dkutenic@cisco.com>
Merge "BUG-730 : added tests for Encoders/Decoders in PCEP."