Merge branch 'version/2.1' into version/2.2

* version/2.1:
  Backported the recent changes from Ensembl's DBConnection

modules/Bio/EnsEMBL/Hive/DBSQL/CoreDBConnection.pm

@@ -809,7 +809,7 @@ sub reconnect {
 =cut
 
 sub do {
-   my ($self,$string) = @_;
+   my ($self,$string, $attr, @bind_values) = @_;
 
    if( ! $string ) {
      throw("Attempting to do an empty SQL query.");
@@ -820,7 +820,7 @@ sub do {
    
    my $do_result = $self->work_with_db_handle(sub {
      my ($dbh) = @_;
-     my $result = eval { $dbh->do($string) };
+     my $result = eval { $dbh->do($string, $attr, @bind_values) };
      $error = $@ if $@;
      return $result;
    });