Merge pull request #762 from edx/e0d/devstack-fix

bug in truthiness.

playbooks/roles/edxlocal/tasks/main.yml

@@ -20,7 +20,7 @@
     login_password={{ EDXAPP_MYSQL_PASSWORD }}
     state=present
     encoding=utf8
-  when: EDXAPP_MYSQL_USER
+  when: EDXAPP_MYSQL_USER is defined
     
 - name: create a database for xqueue
   mysql_db: >
@@ -29,7 +29,7 @@
     login_password={{ XQUEUE_MYSQL_PASSWORD }}    
     state=present
     encoding=utf8
-  when: XQUEUE_MYSQL_USER    
+  when: XQUEUE_MYSQL_USER is defined
 
 - name: create a database for ora
   mysql_db: >
@@ -38,7 +38,7 @@
     login_password={{ ORA_MYSQL_PASSWORD }}    
     state=present
     encoding=utf8
-  when: ORA_MYSQL_USER    
+  when: ORA_MYSQL_USER is defined
 
 - name: create a database for discern
   mysql_db: >
@@ -47,7 +47,7 @@
     login_password={{ DISCERN_MYSQL_PASSWORD }}    
     state=present
     encoding=utf8
-  when: DISCERN_MYSQL_USER    
+  when: DISCERN_MYSQL_USER is defined
 
 
 - name: install memcached