fix ./dev create-barclamp

Fix a syntax error, and stop 1.9.3 spewing warnings about using
class variables from the top level.
Increase admin node disk size - was running out of space
switch to using release/hadoop-2.4/master branch
switch to using release/hadoop-2.4/master branch
Merge pull request #1969 from jtwill98/pull-req-master-28c502e2af8547f7b05f5684c219a202fe51bb03

Change hadoop-2.4 release for cloudera to use hadoop-2.4 brancen openstack release [1/1]
Merge pull request #1967 from arkadykanevsky/pull-req-master-37f759ac3e7255aeb9980c9fd26aaaff8674a034

Increase admin node disk size - was running out of space [1/1]
Merge pull request #1960 from aspiers/fix/dev-create-bc

Several +1 and got smoketested => merging.
Merge remote-tracking branch 'crowbar/master'