tree 54401f446c81abcbfeac4feae8c8515ea589be7f
parent 463d62a05f70632e7db48ce94e80db4fdab7b914
author zhufl <zhu.fanglei@zte.com.cn> 1482809971 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1483927155 +0800

Allow not the same sequence in container_formats and disk_formats

In glance v1, If container_format is one of ['ami', 'ari', 'aki'],
then disk_format must be same with container_format, otherwise
we will get an exception:
     "Invalid mix of disk and container formats. When setting a disk
      or container format to one of 'aki', 'ari', or 'ami', the
      container and disk formats must match."

And in tempest.conf, the container_format and disk_format may be of
different item sequence, such as:
    container_formats = ami,ari,aki,bare
    disk_formats = ari,ami,aki,vhd
In this case, the testcase may fail unexpectedly, so this is to
select one in disk_formats list that is same with container_format,
to avoid the unexpected failure.

Change-Id: Ia64e9ad70c78d8f26f117f90384756f78de164d8