Merge pull request #1 from hkumarmk/cleanedup

Removed all unncessary files from contrail module
Added travis ci configs
Merge pull request #2 from hkumarmk/travis

Added travis ci configs
Added contrail::system_config, added unit tests

contrail::system_config configure the basic system parameters to
make the system ready to run contrail control node applications in it.

Also enabled rspec, added unit tests for contrail::system_config