Upgrade binary_struct to 2.0
Added intervals to button fields

Intervals were missing for button fields

https://bugzilla.redhat.com/show_bug.cgi?id=1143019
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 #233 from Fryguy/upgrade_binary_struct

Upgrade binary_struct to 2.0
Fixed link to a 'Cloud Tenant' from Instance Summary screen.

Added a check to fix undefined_method 'cloud_tenant ' error for an Amazon Instance.

https://bugzilla.redhat.com/show_bug.cgi?id=1146264
https://bugzilla.redhat.com/show_bug.cgi?id=1146265
Merge pull request #687 from Fryguy/rip_out_cc_rakefile_stuff

Adjust specs for cleaner testing on Travis
Merge pull request #706 from h-kataria/fixed_link_to_tenant_from_amazon_instance_summary

Fixed link to a 'Cloud Tenant' from Instance Summary screen.
Merge pull request #677 from psav/fix_interval

Added intervals to button fields