MySQL: change default MySQL collate to utf8_general_ci

Install & configure MySQL database by using utf8_general_ci collation
which is the way documented in OpenStack [1] and already the default
in puppetlabs-mysql [2].

[1] http://goo.gl/GA5gyZ
[2] https://github.com/puppetlabs/puppetlabs-mysql/blob/master/manifests/db.pp#L7

Change-Id: I1116cb941e9e432edb6228950c2b0cb4b2790802
Closes-bug: #1446375

manifests/db/mysql.pp

@@ -47,7 +47,7 @@
 #
 # [*collate*]
 #   (optional) Charset collate of tuskar database
-#   Defaults 'utf8_unicode_ci'.
+#   Defaults 'utf8_general_ci'.
 #
 # [*mysql_module*]
 #   (optional) Deprecated. Does nothing
@@ -59,7 +59,7 @@ class tuskar::db::mysql(
   $host          = '127.0.0.1',
   $allowed_hosts = undef,
   $charset       = 'utf8',
-  $collate       = 'utf8_unicode_ci',
+  $collate       = 'utf8_general_ci',
   $mysql_module  = undef,
 ) {
 

spec/classes/tuskar_db_mysql_spec.rb

@@ -17,7 +17,7 @@ describe 'tuskar::db::mysql' do
       :password      => 's3cr3t',
       :user          => 'tuskar',
       :charset       => 'utf8',
-      :collate       => 'utf8_unicode_ci',
+      :collate       => 'utf8_general_ci',
       :host          => '127.0.0.1',
     }
   end