-fixed an update issue with actual group item

- simply didn't open grp file in "out" mode on update
-made update a bit more sturdy is group not found on update
  - prevent client can crash librs
  
- updated unit tests for grps and messages
- removed data base removal on db reset as cannot rekey db unfortunately (as passphrase (ssl) cannot be kept in the clear in mem)

 

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs_finale@6873 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/retroshare/rsgxsifacetypes.h

@@ -46,6 +46,7 @@ public:
 
             mGroupStatus = 0;
             mCircleType = 0;
+            mAuthenFlags = 0;
 
             mPublishTs = 0;
     }