Changes:
For createVolume API with custom size the awsapi component chooses the custom size disk offering present on CloudStack, sice CS createVolume API needs an offering Id.
But if there are multiple custom size disk offerings, and some of the offerings have tags, awsapi should try to choose a non-tagged custom offering first. There is a reason for people to tag a disk offering and using that on every user API call may not be preferable.
If all disk offerings are tagged however, awsapi will choose one of them.
Verified the output of,
1. ec2-create-tags for all 4 supported ec2 resources(image, instance, volume and snapshot) with and without tag-value.
2. ec2-delete-tags for all types of created tags.
3. ec2-describe-tags with and without all supported filter.