Remove hard-code of default identity api version

Current default matches the default value in Horizon, thus hard-coding
the default value is not necessary.

Change-Id: I03ef1e6e894322acf0a5177c155b04196999db22

manifests/init.pp

@@ -318,7 +318,7 @@
 #  [*api_versions*]
 #    (optional) A hash of parameters to set specific api versions.
 #    Example: api_versions => {'identity' => 3}
-#    Default to 'identity' => 3
+#    Default to {}
 #
 #  [*keystone_multidomain_support*]
 #    (optional) Enables multi-domain in horizon. When this is enabled, it will require user to enter
@@ -608,7 +608,7 @@ class horizon(
   $policy_files_path                   = undef,
   $policy_files                        = undef,
   $redirect_type                       = 'permanent',
-  $api_versions                        = {'identity' => '3'},
+  $api_versions                        = {},
   $keystone_multidomain_support        = false,
   $keystone_default_domain             = undef,
   $keystone_domain_choices             = undef,

spec/classes/horizon_init_spec.rb

@@ -60,7 +60,6 @@ describe 'horizon' do
           "LOGOUT_URL = '#{platforms_params[:root_url]}/auth/logout/'",
           "LOGIN_REDIRECT_URL = '#{platforms_params[:root_url]}/'",
           "ALLOWED_HOSTS = ['some.host.tld', ]",
-          "    'identity': 3,",
           'HORIZON_CONFIG["password_autocomplete"] = "off"',
           'HORIZON_CONFIG["images_panel"] = "legacy"',
           "SECRET_KEY = 'elj1IWiLoWHgcyYxFVLj7cM5rGOOxWl0'",
@@ -121,7 +120,7 @@ describe 'horizon' do
           :wsgi_processes                 => '30',
           :wsgi_threads                   => '5',
           :secure_cookies                 => true,
-          :api_versions                   => {'identity' => 2.0},
+          :api_versions                   => {'identity' => 3},
           :keystone_multidomain_support   => true,
           :keystone_default_domain        => 'domain.tld',
           :overview_days_range            => 1,
@@ -151,7 +150,7 @@ describe 'horizon' do
           'CSRF_COOKIE_SECURE = True',
           'SESSION_COOKIE_SECURE = True',
           'SESSION_COOKIE_HTTPONLY = True',
-          "    'identity': 2.0,",
+          "    'identity': 3,",
           "OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True",
           "OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = 'domain.tld'",
           'HORIZON_CONFIG["password_autocomplete"] = "on"',