chore: update common templates (#143)

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.kokoro/common.sh

@@ -13,18 +13,28 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# set -eo pipefail
-
 function retry_with_backoff {
     attempts_left=$1
     sleep_seconds=$2
     shift 2
     command=$@
 
+
+    # store current flag state
+    flags=$-
+
+    # allow a failures to continue
+    set +e
     echo "${command}"
     ${command}
     exit_code=$?
 
+    # restore "e" flag
+    if [[ ${flags} =~ e ]]
+    then set -e
+    else set +e
+    fi
+
     if [[ $exit_code == 0 ]]
     then
         return 0

.kokoro/nightly/integration.cfg

@@ -6,11 +6,26 @@ env_vars: {
   value: "gcr.io/cloud-devrel-kokoro-resources/java8"
 }
 
+env_vars: {
+  key: "JOB_TYPE"
+  value: "integration"
+}
+
+env_vars: {
+  key: "GCLOUD_PROJECT"
+  value: "gcloud-devel"
+}
+
 env_vars: {
   key: "ENABLE_BUILD_COP"
   value: "true"
 }
 
+env_vars: {
+    key: "GOOGLE_APPLICATION_CREDENTIALS"
+    value: "keystore/73713_java_it_service_account"
+}
+
 before_action {
   fetch_keystore {
     keystore_resource {