Bug fix 1360420, adding noprompt option

Bug fix 1360420: traf_ambari_mods script will know sleep for 2 seconds
after each call to config.sh to make sure config.sh has enough time to
set each of the HBase configurations.

Added --noprompt option to cloudera_setup to allow for more automation.

No longer checking for an id_rsa file if running on one node to allow
for more automation.

Change-Id: If4bde791f5baaf4b538fc15c3b58e1e446552faf