cubicweb #4601328 Cannot run pg-based and sqlite-based tests in a same process [validation pending]

It will fail with something like:

IOError: [Errno 2] No such file or directory: 'cache_d9b097ad4d_tmpdb___default_empty_db__'

This is because the db_cache_key is driver independent.

prioritynormal
typebug
done in3.19.6
load1.000
load left0.000
closed by#91a8f355c082 [devtools] Avoid db_cache collisions and mis-loading
patch[devtools] Avoid db_cache collisions and mis-loading [applied]