add pyv to file template; use = for all custom args

add pyv to file template; use = for all custom args

adding "test/" to pytest doesnt work because then we can't indicate
a specific set of test files.  use = for all sqlalchemy-custom
parameters instead to avoid [1]

[1] https://github.com/pytest-dev/pytest/issues/13913

Change-Id: I9eb5bbfac734fcb145fcf3ae58fcc55df6bb6e71