Make the package command of release script use branch and tag options

git co test-release-with-tag -q

./scripts/release.py package -b master --skipTests
$> git fetch origin
$> git checkout master -q
$> git rebase origin/master
Cannot rebase: You have unstaged changes.
Please commit or stash them.
$> git stash
Saved working directory and index state WIP on master: 37c5f7e Merge branch 'fix-NXP-13268-short-annot'
HEAD is now at 37c5f7e Merge branch 'fix-NXP-13268-short-annot'
$> git rebase origin/master
Current branch master is up to date.
$> git stash pop -q

Working on Nuxeo main repository...
Releasing from branch:   master
Current version:         5.9.1-SNAPSHOT
Tag:                     release-5.9.1-I20131129_1827
Next version:            5.9.1-SNAPSHOT
Maintenance branch deleted
Tests execution is skipped
Parameters stored in /home/julien/ws-ssd/release.log

[.]
$> git fetch origin
$> git checkout test-release-with-tag -q

Using Maven introspection of the POM file to find the list of modules...
[addons]
$> git fetch origin
$> git checkout --track -b test-release-with-tag origin/test-release-with-tag -q
fatal: Cannot update paths and switch to branch 'test-release-with-tag' at the same time.
Did you intend to checkout 'origin/test-release-with-tag' which can not be resolved as commit?
[ERROR] Command 'git checkout --track -b test-release-with-tag origin/test-release-with-tag -q' returned non-zero exit code (128)