Adds variables to keycloak docker image and update

Updates keycloak image to keycloak version 1.9.5.Final
Adds variables to set Manager host and port
Adds variables to set Gateway host and port
Merges realm json files into one template file

tools/docker/keycloak/Dockerfile

@@ -1,14 +1,29 @@
-FROM jboss/keycloak:1.9.0.Final
+FROM jboss/keycloak:1.9.5.Final
 
 ENV JAVA_OPTS "-Djava.security.egd=file:///dev/urandom"
 ENV REALM_DIR $JBOSS_HOME/realms
+ENV REALM_FILE $REALM_DIR/apiman-realm.json
+ENV REALM_FILE_TMPL $REALM_DIR/apiman-realm.json.tmpl
 ENV KC_USER_NAME "admin"
 ENV KC_USER_PASSWORD "admin123!"
+ENV MANAGER_HOST "localhost"
+ENV GATEWAY_HOST "localhost"
+ENV MANAGER_PORT "8080"
+ENV GATEWAY_PORT "8080"
+ENV MANAGER_HTTPS_PORT "8443"
+ENV GATEWAY_HTTPS_PORT "8443"
 
 # Add wrapping docker entrypoint
 ADD scripts/docker-entrypoint.sh ${JBOSS_HOME}/bin/docker-entrypoint.sh
 
 # Add realm definition file
 ADD realms $REALM_DIR
 
+# change owner of newely created directory and install gettext package for envsubst
+USER root
+RUN chown -R jboss:jboss ${REALM_DIR} &&\
+    yum update -y &&\
+    yum install -y gettext
+USER jboss
+
 ENTRYPOINT ["sh", "/opt/jboss/keycloak/bin/docker-entrypoint.sh"]