controller: fix exp_msg validation when mixing OF versions

The OpenFlow version configured on the command line might not match the version
of messages sent by the switch.
bundle test cases
move bundle tests from tests-1.3 to tests-1.4
bundle tests: use ofp instead of importing of14 manually
Merge into master from pull request #151:
bundle test cases (https://github.com/floodlight/oftest/pull/151)