Fix galera.master and galera.slave enabling

Change-Id: I88e3591eaa018406c48dd790ce946a9f783aa758

galera/files/debian.cnf

-{%- if pillar.galera.master is defined %}
+{%- if pillar.galera.get('master',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import master with context %}
 {%- set service = master %}
 {%- endif %}
-{%- if pillar.galera.slave is defined %}
+{%- if pillar.galera.get('slave',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import slave with context %}
 {%- set service = slave %}
 {%- endif %}

galera/files/my.cnf

 # All files in this package is subject to the GPL v2 license
 # More information is in the COPYING file in the top directory of this package.
 # Copyright (C) 2011 severalnines.com
-{%- if pillar.galera.master is defined %}
+{%- if pillar.galera.get('master',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import master with context %}
 {%- set service = master %}
 {%- endif %}
-{%- if pillar.galera.slave is defined %}
+{%- if pillar.galera.get('slave',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import slave with context %}
 {%- set service = slave %}
 {%- endif %}

galera/files/my.cnf.container

-{%- if pillar.galera.master is defined %}
+{%- if pillar.galera.get('master',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import master with context %}
 {%- set service = master %}
 {%- endif %}
 [xtrabackup]
 parallel=4
 user={{ service.admin.user }}
-password={{ service.admin.password }}
+password={{ service.admin.password }}

galera/files/my.cnf.init

 # All files in this package is subject to the GPL v2 license
 # More information is in the COPYING file in the top directory of this package.
 # Copyright (C) 2011 severalnines.com
-{%- if pillar.galera.master is defined %}
+{%- if pillar.galera.get('master',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import master with context %}
 {%- set service = master %}
 {%- endif %}
-{%- if pillar.galera.slave is defined %}
+{%- if pillar.galera.get('slave',{}).get('enabled', False) %}
 {%- from "galera/map.jinja" import slave with context %}
 {%- set service = slave %}
 {%- endif %}