Pin tempest plugin versions

Change-Id: I82d0d323da106b91c5120aadce89016f0656e732
diff --git a/configure.sh b/configure.sh
index ab7f543..32887d5 100755
--- a/configure.sh
+++ b/configure.sh
@@ -46,8 +46,8 @@
       export https_proxy=$PROXY
     fi
     rally verify create-verifier --name tempest_verifier_$sub_name --type tempest --source $TEMPEST_REPO --version $tempest_version
-    rally verify add-verifier-ext --source https://github.com/openstack/telemetry-tempest-plugin
-    rally verify add-verifier-ext --source https://github.com/openstack/heat-tempest-plugin
+    rally verify add-verifier-ext --version 7a4bff728fbd8629ec211669264ab645aa921e2b --source https://github.com/openstack/telemetry-tempest-plugin
+    rally verify add-verifier-ext --version 12b770e923060f5ef41358c37390a25be56634f0 --source https://github.com/openstack/heat-tempest-plugin
     pip install --force-reinstall python-cinderclient==3.2.0
     unset https_proxy
   fi