Add container and disk format parameters

Add the following parameters about glance images.
They are utilized in
tempest.api.image.v2.test_images.BasicOperationsImagesTest and
tempest.api.image.v2.test_images.ListImagesTest.

container_formats:
A list of image's container formats that users can specify.

disk_formats:
A list of image's disk formats that users can specify.

DocImpact
Change-Id: I8153cc8a75d52de8f39260675739174a2ea3b4e4
Partial-Bug: #1483177
2 files changed