Adds parameter interpolation for Tempest config

Adds Tempest variable for Volume catalog Type

Change-Id: I4ab968f30146bd9e40533d67dba49114649f029d
diff --git a/tools/configure_tempest.sh b/tools/configure_tempest.sh
index b858d0e..456b3c0 100755
--- a/tools/configure_tempest.sh
+++ b/tools/configure_tempest.sh
@@ -155,6 +155,9 @@
 NETWORK_CATALOG_TYPE=network
 NETWORK_API_VERSION=2.0
 
+# Volume API test configuration
+VOLUME_CATALOG_TYPE=volume
+
 sed -e "
     s,%IDENTITY_USE_SSL%,$IDENTITY_USE_SSL,g;
     s,%IDENTITY_HOST%,$IDENTITY_HOST,g;
@@ -198,6 +201,7 @@
     s,%IDENTITY_ADMIN_TENANT_NAME%,$IDENTITY_ADMIN_TENANT_NAME,g;
     s,%NETWORK_CATALOG_TYPE%,$NETWORK_CATALOG_TYPE,g;
     s,%NETWORK_API_VERSION%,$NETWORK_API_VERSION,g;
+    s,%VOLUME_CATALOG_TYPE%,$VOLUME_CATALOG_TYPE,g;
 " -i $TEMPEST_CONF
 
 echo "Created tempest configuration file:"