Stop using deprecated TESTR_FULL option

The TESTR_FULL option was added back when tempest was running by
default with nosestests serially to test using testr in parallel.
However, this migration happened >1yr ago and the testr-full job is
just a duplicate of the regular full now. This commit removes all uses
of it from job definitions.

Change-Id: I8af1b4bc0623e89786b34359c6e75aacb21b91ab
Merge "Stop using deprecated TESTR_FULL option"