Merge pull request openshift#7467 from tmorriso-rh/enterprise-3.7-stage

[enterprise-3.7] Changed MYSQL_PASSPHRASE to MYSQL_PASSWORD in Extern…

Author: Traci Morrison

Diff for: dev_guide/integrating_external_services.adoc

@@ -214,7 +214,7 @@ variables:
 - `*EXTERNAL_MYSQL_SERVICE_SERVICE_HOST=<ip_address>*`
 - `*EXTERNAL_MYSQL_SERVICE_SERVICE_PORT=<port_number>*`
 - `*MYSQL_USERNAME=<mysql_username>*`
-- `*MYSQL_PASSPHRASE=<mysql_passphrase>*`
+- `*MYSQL_PASSWORD=<mysql_password>*`
 - `*MYSQL_DATABASE_NAME=<mysql_database>*`
 
 The application is responsible for reading the coordinates and credentials for