Policy update on put for IAM user, group and role - EUCA-8729

Euare now updates the existing policy for put actions as per AWS/IAM.

EUCA-8729
Fix use of ramdisk identifier from image manifest - EUCA-8736

EUCA-8736
Merge remote-tracking branch 'origin/dev/sjones/EUCA-8729' into testing
Merge remote-tracking branch 'origin/dev/sjones/EUCA-8736' into testing