mysqlbackup: Reenable tests

Previously the tests were only executed on mysql versions older than
5.7.0. This commit removes the contraint.

spec/acceptance/04_mysql_backup_spec.rb

@@ -35,7 +35,7 @@ class { 'mysql::server::backup':
     end
   end
 
-  describe 'mysqlbackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') do
+  describe 'mysqlbackup.sh' do
     it 'runs mysqlbackup.sh with no errors' do
       run_shell('/usr/local/sbin/mysqlbackup.sh') do |r|
         expect(r.stderr).to eq('')
@@ -84,6 +84,7 @@ class { 'mysql::server::backup':
             backupdir         => '/tmp/backups',
             backupcompress    => true,
             file_per_database => true,
+            provider          => 'mysqlbackup',
             postscript        => [
               'rm -rf /var/tmp/mysqlbackups',
               'rm -f /var/tmp/mysqlbackups.done',
@@ -98,7 +99,7 @@ class { 'mysql::server::backup':
       end
     end
 
-    describe 'mysqlbackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') do
+    describe 'mysqlbackup.sh' do
       it 'runs mysqlbackup.sh with no errors without root credentials' do
         run_shell('HOME=/tmp/dontreadrootcredentials /usr/local/sbin/mysqlbackup.sh') do |r|
           expect(r.stderr).to eq('')