testbot/lib: Fix an error message by adding a space between the property name and its value.

[Francois Gouget]

---

This way we get 'User admin already exists' instead of 'Useradmin 
already exists'.

 testbot/lib/ObjectModel/Collection.pm |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testbot/lib/ObjectModel/Collection.pm b/testbot/lib/ObjectModel/Collection.pm
index 3d7f78c..a81a5d9 100644
--- a/testbot/lib/ObjectModel/Collection.pm
+++ b/testbot/lib/ObjectModel/Collection.pm
@@ -289,7 +289,7 @@ sub Validate
           my $ExistingItem = $self->GetBackEnd()->LoadItem($self, $Item->GetKey());
           if (defined($ExistingItem))
           {
-            $ErrMessage = $self->GetItemName() . $ErrMessage .
+            $ErrMessage = $self->GetItemName() . " " . $ErrMessage .
                           " already exists";
             return ($Item->GetKey(), undef, $ErrMessage);
           }
-- 
1.7.10.4