Switch POM to use p4java 2013.2.894409-SNAPSHOT.
Switch POM to use p4java 2013.2.894409-SNAPSHOT.

- p4java bug fix for spaces in workspace Root

jenkinsci/p4-plugin,jenkinsci/p4-plugin,rpocase/p4-plugin,Palmr/p4-plugin,develoken/p4-plugin,rpocase/p4-plugin,tanium/p4-plugin,Palmr/p4-plugin,Palmr/p4-plugin,jenkinsci/p4-plugin,rpocase/p4-plugin,tanium/p4-plugin,develoken/p4-plugin,develoken/p4-plugin,tanium/p4-plugin