release:branch makes pom changes for branch in 'master' before branching

release:branch makes the change for the branch version before branching. This means the version change is seen in the trunk's history.

If master is currently '1-SNAPSHOT':

* 1-SNAPSHOT [master]

and I create a new 'branch-with-hacks' branch as '1.hacks-SNAPSHOT' then I'll see this in my log:

* 1-SNAPSHOT [master]
|
* 1.hacks-SNAPSHOT [branch-with-hacks]
|
* 1-SNAPSHOT

with a commit and a revert on master where I would expect:

* 1.hacks-SNAPSHOT [branch-with-hacks]
|
* 1-SNAPSHOT [master]

with 'master' remaining unaffected.