QENG-1080 Fixed issue where we appended the source path to the target path, we now check for absolute path prior
Merge pull request #408 from anodelman/ec2

(MAINT) nits in beaker ec2 support
(GEM) version bump for 1.17.3 gem
(HISTORY) update history for 1.17.3 gem
Merge pull request #410 from anodelman/make-gem

create beaker 1.17.3 gem
Merge pull request #409 from cyberious/ScpCopyIgnoreFix

QENG-1080 do_scp_to now checks for source path of absolute and prunes accordingly
Merge pull request #411 from anodelman/ec2

(MAINT) kill zombies after provided number of hours
(GEM) version bump for 1.17.4
(HISTORY) update history for beaker 1.17.4 gem
Merge pull request #413 from anodelman/make-gem

create beaker 1.17.4 gem
(MAINT) add ability to list all instances associated with an ec2 keyname

- convenience function for listing all instances associated with a
  provided keyname, useful for tracking what's happening in ec2