[api] make sure we can call innocent rake tasks without mysql

e.g. checking code

src/api/config/initializers/hoptoad.rb

@@ -1,8 +1,14 @@
 HoptoadNotifier.configure do |config|
   # Change this to some sensible data for your errbit instance
   config.api_key = CONFIG['errbit_api_key'] || 'YOUR_ERRBIT_API_KEY'
-  config.host    = Configuration.errbit_url || 'YOUR_ERRBIT_HOST'
-  if CONFIG['errbit_api_key'].blank? || Configuration.errbit_url.blank?
+  begin
+    errbit_url = Configuration.errbit_url
+  rescue Mysql2::Error
+    # no mysql, no exceptions - useful for rake tasks
+    errbit_url = nil
+  end
+  config.host    = errbit_url || 'YOUR_ERRBIT_HOST'
+  if CONFIG['errbit_api_key'].blank? || errbit_url.blank?
     config.development_environments = "production development test"
   else
     config.development_environments = "development test"

src/api/config/initializers/wrap_parameters.rb

@@ -5,6 +5,7 @@
 require 'active_support/core_ext/hash/conversions'
 require 'action_dispatch/http/request'
 require 'active_support/core_ext/hash/indifferent_access'
+require 'api_exception'
 
 # Disable all default rails parameter parsing