Bring the wildcard back to the branch specification

The commit 38db357c removed */ from the branch specification. However, the Jenkins documentation states:

If your branch name has a / in it make sure to use the full reference above. When not presented with a full path the plugin will only use the part of the string right of the last slash. Meaning foo/bar will actually match bar

Signed-off-by: Andrej Shadura <@andrewsh>