1. Add handling of enums in protobuf server. Enum names will be
   used as tags to index the received statistics.
2. Add libprotobuf error log handler to use the log4cplus root
   logger.
3. Added code to check the libprotobuf library version against
   the header files version and do cleanup on shutdown.
Closes-Bug: #1386433

Change-Id: Id08ecb7ec2a697173881b2d7ec5adb493deebd42
Merge "1. Add handling of enums in protobuf server. Enum names will be    used as tags to index the received statistics. 2. Add libprotobuf error log handler to use the log4cplus root    logger. 3. Added code to check the libprotobuf library version against    the header files version and do cleanup on shutdown. Closes-Bug: #1386433"