Add tests for different queue types

[mmacata]

In #421 and #355 the queue was separated to allow an actinia worker to process the job independantely from the instance which received the job.

There are no tests for this yet as a different config is needed and a mechanism how to start the worker.
Tests would be needed for queue_type = per_job and queue_type = per_user.

It is also necessary to get rid of all the config overwrites inside the tests, e.g. for resource storage or redis database.

[mmacata]

Also check why i

• ACTINIA_CUSTOM_TEST_CFG and DEFAULT_CONFIG_PATH needs to be set to test config
• in the actinia-test.cfg the redis port needs to be set to default value, else 7000 is assumed.