Fix broken sensitive parameter for mysql::password

Revert broken change of #1557 and fixes the spec test for it by removing
the skip.

Author: cruelsmith

lib/puppet/functions/mysql/password.rb

@@ -19,7 +19,7 @@
     return_type 'Variant[String, Sensitive[String]]'
   end
 
-  def password(password, sensitive: false)
+  def password(password, sensitive = false)
     password = password.unwrap if password.is_a?(Puppet::Pops::Types::PSensitiveType::Sensitive)
 
     result_string = if %r{\*[A-F0-9]{40}$}.match?(password)

lib/puppet/functions/mysql_password.rb

@@ -15,7 +15,7 @@
     return_type 'Variant[String, Sensitive[String]]'
   end
 
-  def mysql_password(password, sensitive: false)
+  def mysql_password(password, sensitive = false)
     call_function('deprecation', 'mysql_password', "This method has been deprecated, please use the namespaced version 'mysql::password' instead.")
     call_function('mysql::password', password, sensitive)
   end

spec/functions/mysql_password_spec.rb

@@ -25,7 +25,6 @@
 
   # Test of a Returnvalue of Datatype Sensitive does not work
   it 'returns Sensitive with sensitive=true' do
-    skip 'should have a Returnvalue of Datatype Sensitive'
     expect(subject).to run.with_params('password', true).and_return(sensitive('*2470C0C06DEE42FD1618BB99005ADCA2EC9D1E19'))
   end