ci_template: Remove the j = 1 restriction from check

Previously we were forcing tests to run with j 1 to avoid random
failures/races that occurred due to tests being racy. Majority
of those tests have been blacklisted and this should no longer be
needed.

gitlab/ci_template.yml

@@ -182,7 +182,6 @@ build android arm64 api28:
       ./gst-uninstalled.py
       gst-validate-launcher ${TEST_SUITE}
       -fs
-      -j=1
       --mute
       --shuffle
       --no-display