Merge pull request #14 from thouveng/use-get-with-enabled

Use get function to check if a "role" is enabled
diff --git a/grafana/collector.sls b/grafana/collector.sls
index 4532547..0457974 100644
--- a/grafana/collector.sls
+++ b/grafana/collector.sls
@@ -1,5 +1,5 @@
 {%- from "grafana/map.jinja" import collector with context %}
-{%- if collector.enabled %}
+{%- if collector.get('enabled', False) %}
 
 grafana_grains_dir:
   file.directory:
diff --git a/grafana/server.sls b/grafana/server.sls
index 249898c..8ab3403 100644
--- a/grafana/server.sls
+++ b/grafana/server.sls
@@ -1,5 +1,5 @@
 {%- from "grafana/map.jinja" import server with context %}
-{%- if server.enabled %}
+{%- if server.get('enabled', False) %}
 
 grafana_packages:
   pkg.installed: