With the introduction of tempest plugins we can now remove the third
party tests for the ec2 api using boto. They've always been the ugly
duckling in tempest (except that it never turned into a swan) where
they go against some of the fundamental principles of tempest tests.
For exaple, like having it's own client implementation, oh and testing
OpenStack APIs. This patch removes all the pieces of the third party
test dir and deprecates all the config options related to boto. A
plugin implementation is being worked [1] that can be used to fill
the coverage hole left by removing these from the tempest tree
[1] https://github.com/mtreinish/tempest_ec2
Change-Id: Ib5e24e19bcba9808a9f49fe7f328668df77fe4f9
42d69512d9