Adjust specs for cleaner testing on Travis.

Also, provide default rake tasks for lib and vmdb directory for testing.
Merge common module EvmTestHelper from two files.
Remove unused rake task test:lib
Remove no longer used check for RSpec being missing.
Loosen dependencies on bundler and rake to allow upgrading.
Standardize .rspec* files.
Merge pull request #687 from Fryguy/rip_out_cc_rakefile_stuff

Adjust specs for cleaner testing on Travis