Add spec tests

This commit adds spec tests for the changes made in the previous
commit.

Author: chelnak

spec/classes/mysql_server_spec.rb

@@ -198,16 +198,6 @@
           it { is_expected.not_to contain_mysql_user('root@localhost') }
           it { is_expected.not_to contain_file('/root/.my.cnf') }
         end
-        describe 'when install_secret_file set to /root/.mysql_secret' do
-          let(:params) { { install_secret_file: '/root/.mysql_secret' } }
-
-          it {
-            is_expected.to contain_exec('remove install pass').with(
-              command: 'mysqladmin -u root --password=$(grep -o \'[^ ]\\+$\' /root/.mysql_secret) password \'\' && rm -f /root/.mysql_secret',
-              onlyif: 'test -f /root/.mysql_secret',
-            )
-          }
-        end
       end
 
       context 'mysql::server::providers' do