Fix backward compatibility, storage_type/invetory reclass defaults

Change-Id: I8dee93ffd4441391a5b26ba2c5b46e43357a0ca7

.kitchen.yml

       pillars-from-files:
         salt.sls: tests/pillar/master_single_extreclass.sls
 
+  - name: master-backward-compat
+    provisioner:
+      pillars-from-files:
+        salt.sls: tests/pillar/master_single_extolddays.sls
+
   - name: control-default
     provisioner:
       grains:

salt/files/master.conf

 {%- if master.pillar.engine == 'reclass' or (master.pillar.engine == 'composite' and master.pillar.reclass is defined) %}
 
 reclass: &reclass
-  storage_type: {{ master.pillar.get('reclass', {'storage_type': 'yaml_fs'}).storage_type }}
-  inventory_base_uri: {{ master.pillar.get('reclass', {'inventory_base_uri': '/srv/salt/reclass'}).inventory_base_uri }}
+  storage_type: {{ master.pillar.get('reclass', {}).get('storage_type', 'yaml_fs') }}
+  inventory_base_uri: {{ master.pillar.get('reclass', {}).get('inventory_base_uri', '/srv/salt/reclass') }}
   {# Additional options, for backward compatibility salt:master:pillar might not be defined #}
   {%- if master.pillar.reclass is defined %}
   {%- if master.pillar.reclass.reclass_source_path is defined %}

tests/pillar/master_single_extolddays.sls

+git:
+  client:
+    enabled: true
+linux:
+  system:
+    enabled: true
+reclass:
+  storage:
+    enabled: true
+    data_source:
+      engine: git
+      branch: master
+      address: 'https://github.com/salt-formulas/openstack-salt.git'
+salt:
+  master:
+    enabled: true
+    command_timeout: 5
+    worker_threads: 2
+    base_environment: prd
+    #environment:
+    # prd:
+    #   formula:
+    #     python:
+    #       source: git
+    #       address: 'https://github.com/salt-formulas/salt-formula-python.git'
+    #       revision: master
+    pillar:
+      engine: reclass