* Receive plugins versions with underscores.
New jenkins plugin versions have underscores in them (example: https://plugins.jenkins.io/credentials/). The operator refuses configuration for such plug-ins as they do not match the existing regex.
* Add tests to underscores in plugin versions
Adds a new test to check that versions with underscores are valid.
* Synchronise regexps character order to avoid range
Make two related regexps more evidently similar to each other and re-order the symbols so that the - is not interpreted.