Merge branch '44-bootstrap-fails-if-release_name-has-upper-case-characters' into 'master'

Resolve "bootstrap fails if release_name has upper case characters"

Closes #44

See merge request openappstack/bootstrap!52

README.md

@@ -5,3 +5,4 @@ The OpenAppStack bootstrap script allows you to easily set up a new OpenAppStack
 Please refer to https://openappstack.net/documentation.html for further details,
 and to https://openappstack.net/tutorial.html for a step by step installation tutorial
 how to bootstrap your cluster.
+

ansible/bootstrap.yml

@@ -8,6 +8,12 @@
         msg: >
           "You must update Ansible to at least 2.6 to bootstrap your OAS cluster."
 
+    - name: Release name must start with lower case 
+      assert:
+        that: "'{{ release_name }}' is match('^[a-z]')"
+        msg: >
+          "Release name ({{ release_name }}) should start with lower case."
+
 - name: Prepare nodes
   hosts: cluster
   roles: