Disable `should` syntax in Rspec
Disable `should` syntax in Rspec

`should` syntax is deprecated as of Rspec version 3.0 and the previous
commit converts all of our tests to use `expect` for consistency.

To prevent regressions, this change disables `should` syntax for this
gem.

gds-operations/vcloud-net_launcher,gds-operations/vcloud-net_launcher,gds-operations/vcloud-net_launcher