Remove test_metadata.py symlink from packages/job_execution

waiting for a better code decomposition.

xref. https://github.com/galaxyproject/galaxy/issues/8240

packages/job_execution/tests/test_metadata.py

@@ -1 +0,0 @@
-../../../test/unit/tools/test_metadata.py

packages/test.sh

@@ -28,7 +28,7 @@ PACKAGE_DIRS=(
 )
 # containers has no tests, tool_util not yet working 100%,
 # data has many problems quota, tool shed install database, etc..
-RUN_TESTS=(1 1 1 0 1 0 0 0 1 0)
+RUN_TESTS=(1 1 1 0 1 0 1 0 1 0)
 
 for ((i=0; i<${#PACKAGE_DIRS[@]}; i++)); do
     package_dir=${PACKAGE_DIRS[$i]}