Rename auth_config and env_config by service

* Rename auth_config and env_config to be specific to LMS and CMS
* Minor CMS configuration cleanups elsewhere

playbooks/roles/cms/templates/auth.json.j2

 {# {% do auth_config.update( { < override some hash keys > } )  %} #}
-{{ auth_config | to_nice_json }}
+{{ cms_auth_config | to_nice_json }}

playbooks/roles/cms/templates/env.json.j2

-{{ env_config | to_nice_json }}
+{{ cms_env_config | to_nice_json }}

playbooks/roles/cms/vars/main.yml

 # variables common to the cms role, automatically loaded
 # when the role is included
 ---
-auth_config:
+cms_auth_config:
   'CONTENTSTORE':
     'ENGINE':  'xmodule.contentstore.mongo.MongoContentStore'
   'MODULESTORE':
     'default':
       'ENGINE':  'xmodule.modulestore.mongo.MongoModuleStore'
  
-env_config:
+cms_env_config:
   'CACHES':
     'default':
       'BACKEND':  'django.core.cache.backends.memcached.MemcachedCache'
       'KEY_FUNCTION':  'util.memcache.safe_key'
+      'KEY_PREFIX': 'cms.edx.org'
+      'LOCATION': [ "deploycache-large.foo-bar.amazonaws.com:11211" ]
     'mongo_metadata_inheritance':
       'BACKEND':  'django.core.cache.backends.memcached.MemcachedCache'
       'KEY_FUNCTION':  'util.memcache.safe_key'
       'TIMEOUT': 300
+      'KEY_PREFIX': 'cms.edx.org'
+      'LOCATION': [ "deploycache-large.foo-bar.amazonaws.com:11211" ]
     'staticfiles':
       'BACKEND':  'django.core.cache.backends.memcached.MemcachedCache'
       'KEY_FUNCTION':  'util.memcache.safe_key'
+      'KEY_PREFIX': 'cms.edx.org'
+      'LOCATION': [ "deploycache-large.foo-bar.amazonaws.com:11211" ]
   'LOG_DIR': '/mnt/logs/edx'
-  'LOGGING_ENV': 'lms-dev'
-  'SITE_NAME': 'studio.lms-dev.m.edx.org'
+  'LOGGING_ENV': 'cms-dev'
+  'SITE_NAME': 'studio.cms-dev.m.edx.org'
   'SYSLOG_SERVER': 'syslog.a.m.i4x.org'
-  'LMS_BASE': 'lms-dev.m.edx.org'
-  'SESSION_COOKIE_DOMAIN': '.lms-dev.m.edx.org'
+  'LMS_BASE': 'cms-dev.m.edx.org'
+  'SESSION_COOKIE_DOMAIN': '.cms-dev.m.edx.org'
 

playbooks/roles/lms/templates/auth.json.j2

-{{ auth_config | to_nice_json }}
+{{ lms_auth_config | to_nice_json }}

playbooks/roles/lms/templates/env.json.j2

-{{ env_config | to_nice_json }}
+{{ lms_env_config | to_nice_json }}

playbooks/roles/lms/vars/main.yml

 # variables common to the lms role, automatically loaded
 # when the role is included
 ---
-auth_config:
+lms_auth_config:
   'CONTENTSTORE':
     'ENGINE':  'xmodule.contentstore.mongo.MongoContentStore'
   'MODULESTORE':
     'default':
       'ENGINE':  'xmodule.modulestore.mongo.MongoModuleStore'
  
-env_config:
+lms_env_config:
   'CACHES':
     'default':
       'BACKEND':  'django.core.cache.backends.memcached.MemcachedCache'

playbooks/roles/nginx/templates/cms.j2

@@ -64,7 +64,6 @@ server {
     auth_basic            "Restricted";
     auth_basic_user_file  /etc/nginx/nginx.htpasswd;
     root {{app_base_dir}};
-    try_files /staticfiles/$file /course_static/$file =404;
 
     # return a 403 for static files that shouldn't be
     # in the staticfiles directory

playbooks/secure_example/vars/edxapp_custom_vars.yml

 ---
-auth_config:
+lms_auth_config:
   'DATABASES':
     'default': { 'ENGINE':  'custom',
       'HOST':  'custom',  'NAME':  'custom',

playbooks/secure_example/vars/edxapp_prod_vars.yml

 ---
-auth_config:
+lms_auth_config:
   'ANALYTICS_API_KEY':  'hidden-prod'
   'AWS_ACCESS_KEY_ID':  'hidden-prod'
   'AWS_SECRET_ACCESS_KEY':  'hidden-prod'
@@ -39,7 +39,7 @@ auth_config:
       'username':  'hidden-prod'}
     'url':  'hidden-prod'
  
-env_config:
+lms_env_config:
   'SYSLOG_SERVER':  'hidden-prod'
   'SITE_NAME':  'hidden-prod'
   'LOG_DIR':  'hidden-prod'

playbooks/secure_example/vars/edxapp_stage_vars.yml

 ---
-auth_config:
+lms_auth_config:
   'ANALYTICS_API_KEY':  'hidden-stage'
   'AWS_ACCESS_KEY_ID':  'hidden-stage'
   'AWS_SECRET_ACCESS_KEY':  'hidden-stage'
@@ -39,7 +39,7 @@ auth_config:
       'username':  'hidden-stage'}
     'url':  'hidden-stage'
  
-env_config:
+lms_env_config:
   'SYSLOG_SERVER':  'hidden-stage'
   'SITE_NAME':  'hidden-stage'
   'LOG_DIR':  'hidden-stage'

playbooks/vars/lms_vars.yml

 ---
-auth_config:
+lms_auth_config:
   'CONTENTSTORE':
     'ENGINE':  'xmodule.contentstore.mongo.MongoContentStore'
   'MODULESTORE':
     'default':
       'ENGINE':  'xmodule.modulestore.mongo.MongoModuleStore'
  
-env_config:
+lms_env_config:
   'CACHES':
     'default':
       'BACKEND':  'django.core.cache.backends.memcached.MemcachedCache'