[rightscale] Update rightscale_tools gem to version 1.7.44.
Bump rightscale cookbook version to 13.5.3.
Bump db_mysql cookbook version because it was previously missed.
Merge pull request #438 from rightscale/servertemplates_14_09_acu175322_no_wait_for_snapshots_on_rax

Servertemplates 14 09 acu175322 no wait for snapshots on rax