ci(kitchen+travis): modify matrix to include `develop` platform

[myii]

• Use balanced matrix based on template-formula guidelines
• Initial ref: https://github.com/saltstack-formulas/template-formula/issues/118
• Fedora still disabled (ref: #129)
• Remove temporary train Gem (CC: @n-rodriguez)

[saltstack-formulas-travis]

:tada: This PR is included in version 0.18.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: