JCloudSlave now inherit from AbstractCloudSlave instead of Slave
slave termination and cacthing exception fixed
Credential field is now password type
add parameter jvmOptions to launch slave agent with custom JavaVM
options
delete unused variable
format xml in propper way, also bumped java version to 1.7
more readable help msg for jvmOptions parameter
added OpenStack zones parameter to restrict spawning cloud slaves to
them