added regex to filter out tags which overlap in repo

[Darkest]

This pull request fixes the following restriction: tag prefixes for each module do not overlap, i.e. !tagA.startsWith(tagB) for each permutation of all tag prefixes

Now tags are filtered by stronger regex, filtering out all tags that do not match the pattern <tagPrefix><tagSeparator>-

[coveralls]

Coverage remained the same at 63.325% when pulling 517dc1d3c5735c3bbbd4b4fdd1034bf56ce4bbc6 on Darkest:master into 5c461cff052621a23180a60b71792bbbc17cabe5 on allegro:master.

[adamdubiel]

This looks really nice, but i'm worried about one thing: user can override tag serialization (using scmVersion.tag.serialize property) and chosen tag serialization might not match stronger regexp.. i'm not yet sure if this is a blocker, but to be on a safe side you might add a config flag to turn "strong regexp" on/off. It could be on by default in 1.10.0 . What do you think?

[Darkest]

I got your idea. Will look into it as i have time.