Don't shallow clone from file:// in integration test

Shallow cloning ends up writing a temporary file in the source git repo,
but we may not have write access to it. So if the REPO_ROOT format is
file based do a full clone.

Change-Id: Ic03af1e55b41a97790de478563100247c37065ab

integration-test/test.sh

@@ -12,7 +12,12 @@ else
     org=$1
     project=$2
 fi
-git clone $REPO_ROOT/$org/$project --depth=1
+
+if [[ $REPO_ROOT  == file://* ]]; then
+    git clone $REPO_ROOT/$org/$project
+else
+    git clone $REPO_ROOT/$org/$project --depth=1
+fi
 cd $project
 set +e
 flake8 --select H --statistics