fixes to HA HDFS startup and add HBase startup
starting ZK in the background
working on SPNEGO configuration
add SPNEGOized web.xml for NN
add ldap_server parameter
hadoop-policy.xml needed with hadoop-2.0.3.
use weak crypto (TODO: make this work with strong crypto)
assign remote debug ports 5007 and 5008 for YARN Resourcemanager and Nodemanager, respectively.
rename 'format-jn' to 'prep-jn-dir'
should have committed this earlier.
add container-log4j.properties to conf files to be installed
add login-via-keytab