Avoid infinite loop in container scanning job. Refs gitlab-org/gitlab-ee#5706

vendor/gitlab-ci-yml/Auto-DevOps.gitlab-ci.yml

@@ -315,7 +315,9 @@ production:
     mv clair-scanner_linux_amd64 clair-scanner
     chmod +x clair-scanner
     touch clair-whitelist.yml
-    while( ! wget -q -O /dev/null http://docker:6060/v1/namespaces ) ; do sleep 1 ; done
+    retries=0
+    echo "Waiting for clair daemon to start"
+    while( ! wget -T 10 -q -O /dev/null http://docker:6060/v1/namespaces ) ; do sleep 1 ; echo -n "." ; if [ $retries -eq 10 ] ; then echo " Timeout, aborting." ; exit 1 ; fi ; retries=$(($retries+1)) ; done
     ./clair-scanner -c http://docker:6060 --ip $(hostname -i) -r gl-sast-container-report.json -l clair.log -w clair-whitelist.yml ${CI_APPLICATION_REPOSITORY}:${CI_APPLICATION_TAG} || true
   }