release:perform - The temporary file "pom.xml.branch" should be ignored as "pom.xml.next" and "pom.xml.tag" are ignored

When performing a release after a branch-dry-run, the temp file 'pom.xml.branch' should be ignored. Now the perform will fail, because the working copy has modifications.

There has been an issue that was closed as "Won't fix": MRELEASE-425

Information about the patch:
Based on r983489 in https://svn.apache.org/repos/asf/maven/release/trunk

Online Compare View: http://github.com/lcorneliussen/maven-release/compare/473197249e1caf39ee2cee6d0efc8a288c30d0c3...939d6e05bbed440622a40b2094e31963d0a90c78

Included commits:

• MRELEASE-425 Fixed: When running release:branch in -DdryRun mode, the resulting pom.xml.branch is seen as an unknown file the next time a release is run (by Lars Corneliussen<me@lcorneliussen.de> on 05.05.2010 17:01:54)