acu97096 - [rightscale] Update rightscale_tools gem to version 1.6.7.
acu97096 - [rightscale] Update rightscale_tools gem to version 1.6.7.
Merge pull request #312 from rightscale/white_13_03_acu97096_check_device_exists_before_mount

acu97096 check device exists before mount