Fix ca location of keycloak

Author: MarcialRosales

selenium/test/oauth/rabbitmq.forward-proxy-oauth-provider.conf

@@ -1,5 +1,5 @@
 auth_oauth2.issuer = ${OAUTH_PROVIDER_URL}
-auth_oauth2.https.cacertfile = ${FORWARD_PROXY_CA_CERT}
+auth_oauth2.https.cacertfile = ${KEYCLOAK_CA_CERT}
 auth_oauth2.proxy = ${FORWARD_PROXY_URL}
 #auth_oauth2.proxy_username = ${FORWARD_PROXY_USERNAME}
 #auth_oauth2.proxy_password = ${FORWARD_PROXY_PASSWORD}