Updated GXS tests, lots of mem leak fixes from valgrind run.

- mem leak caused by not deleting stored msgs and groups, rsdatastore now a group/msg sink
- mem leak caused in rsgxsnetservice by not deleting meta information after retrieval 
- fixed mem leak in rstlvkeyset::getTlv due to tlvbindata making own data copy



git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5616 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/serialiser/rstlvkeys.cc

@@ -322,7 +322,7 @@ bool  RsTlvSecurityKeySet::GetTlv(void *data, uint32_t size, uint32_t *offset) /
 				if (ok)
 				{
 					keys[key.keyId] = key;
-					key.ShallowClear(); /* so that the Map can get control - should be ref counted*/
+					key.TlvClear(); /* so that the Map can get control - should be ref counted*/
 				}
 			}
 				break;