clean up searches on role directly

recipes/django.rb

@@ -107,7 +107,7 @@ if app["database_master_role"]
     dbm = node
   else
   # Find the database master
-    results = search(:node, "run_list:role\\[#{app["database_master_role"][0]}\\] AND chef_environment:#{node.chef_environment}", nil, 0, 1)
+    results = search(:node, "role:#{app["database_master_role"][0]} AND chef_environment:#{node.chef_environment}", nil, 0, 1)
     rows = results[0]
     if rows.length == 1
       dbm = rows[0]

recipes/java_webapp.rb

@@ -75,7 +75,7 @@ if app["database_master_role"]
     dbm = node
   else
   # Find the database master
-    results = search(:node, "run_list:role\\[#{app["database_master_role"][0]}\\] AND chef_environment:#{node.chef_environment}", nil, 0, 1)
+    results = search(:node, "role:#{app["database_master_role"][0]} AND chef_environment:#{node.chef_environment}", nil, 0, 1)
     rows = results[0]
     if rows.length == 1
       dbm = rows[0]

recipes/php.rb

@@ -98,7 +98,7 @@ if app["database_master_role"]
     dbm = node
   else
   # Find the database master
-    results = search(:node, "run_list:role\\[#{app['database_master_role'][0]}\\] AND chef_environment:#{node.chef_environment}", nil, 0, 1)
+    results = search(:node, "role:#{app["database_master_role"][0]} AND chef_environment:#{node.chef_environment}", nil, 0, 1)
     rows = results[0]
     if rows.length == 1
       dbm = rows[0]

recipes/rails.rb

@@ -103,7 +103,7 @@ if app["database_master_role"]
     dbm = node
   else
   # Find the database master
-    results = search(:node, "run_list:role\\[#{app["database_master_role"][0]}\\] AND chef_environment:#{node.chef_environment}", nil, 0, 1)
+    results = search(:node, "role:#{app["database_master_role"][0]} AND chef_environment:#{node.chef_environment}", nil, 0, 1)
     rows = results[0]
     if rows.length == 1
       dbm = rows[0]