Only create clonemap when zuul-cloner is used

In test environments outside of OpenStack-CI, it is
preferred that a file is not created and deleted in
the user home directory, especially if it is not
used.

Change-Id: I5da7802d61d2ab6b03908138e3a3ed2db22e3d29

tests/tests-repo-clone.sh

@@ -34,28 +34,39 @@ export TESTING_HOME=${TESTING_HOME:-$HOME}
 export WORKING_DIR=${WORKING_DIR:-$(pwd)}
 export CLONE_UPGRADE_TESTS=${CLONE_UPGRADE_TESTS:-no}
 
-## Main ----------------------------------------------------------------------
+## Functions -----------------------------------------------------------------
+
+function create_tests_clonemap {
 
 # Prepare the clonemap for zuul-cloner to use
-# This is placed here instead of inside the conditional
-# to prevent indentation problems.
 cat > ${TESTING_HOME}/tests-clonemap.yaml << EOF
 clonemap:
   - name: openstack/openstack-ansible-tests
     dest: ${WORKING_DIR}/tests/common
 EOF
 
+}
+
+## Main ----------------------------------------------------------------------
+
 # If zuul-cloner is present, use it so that we
 # also include any dependent patches from the
 # tests repo noted in the commit message.
 if [[ -x /usr/zuul-env/bin/zuul-cloner ]]; then
 
+    # Prepare the clonemap for zuul-cloner to use
+    create_tests_clonemap
+
+    # Execute the clone
     /usr/zuul-env/bin/zuul-cloner \
         --cache-dir /opt/git \
         --map ${TESTING_HOME}/tests-clonemap.yaml \
         git://git.openstack.org \
         openstack/openstack-ansible-tests
 
+    # Clean up the clonemap.
+    rm -f ${TESTING_HOME}/tests-clonemap.yaml
+
 # Alternatively, use a simple git-clone. We do
 # not re-clone if the directory exists already
 # to prevent overwriting any local changes which
@@ -73,9 +84,6 @@ elif [[ ! -d tests/common ]]; then
     fi
 fi
 
-# Clean up the clonemap.
-rm -f ${TESTING_HOME}/tests-clonemap.yaml
-
 # If this test set includes an upgrade test, the
 # previous stable release tests repo must also be
 # cloned.