hotfix-finish on support branch: update to next SNAPSHOT version after tagging

[puce77]

When running the hotfix-finish goal on a support branch, the support branch stays on the released version instead of the next SNAPSHOT version.

After tagging do something like:

• update to next SNAPSHOT version
• push support branch
• checkout tag
• run postHotfixGoals / run deploy out-of-the-box (using the same Maven arguments such as profiles etc.)

[aleksandr-m]

@puce77 Some use support branches as old production branches, meaning there is no snapshot in there.