helm deploy plugin cannot handle helm release with multiple dashes "-" in the release name.

Observed this this in Frankfurt release. Maybe other releases are affected as well.

Currently it takes second octet of release name and thinks that we are upgrading subchart only, but if that second octet doesn't match any subchart name deploy script does nothing.

Example. Release name is like MYRELEASE-XXX-YYY

SUBCHART_RELEASE=XXX

and RELEASE=MYRELEASE

then it goes through all subcharts and tries to update subchart XXX and as we don't have such subchart it fails.

I created bugfix for this and tested it locally and it worked well. Will create change shortly to add it to Frankfurt.