Generalize volume type handling.
Oops! Fix it so the tests pass.
Bump up ChefSpec version.
Fix up specs for get_volume_type_href.
Appease foodcritic and try out Slack integration for Travis CI.
Merge pull request #16 from rightscale-cookbooks/st_14_13_volume_type_input_also_gp2

St 14 13 volume type input also gp2
Bump version to 1.2.3.
Change condition of scanning for volume changes to be on vmware instead of vsphere.
Update spec test setting virtualization/system during detachment.