BUG#28804 Dbtc::releaseAbortResources() send returnsignal when exists.

On failing to seize space in saveINDXATTRINFO, we need to send a reply
back to API that we've aborted the txn.

Previously we wouldn't send the reply, and the ultra-long timeout
waiting for reply in NdbTransaction would be hit.

This enables "instant" rollback and application notification.

===== ndb/src/kernel/blocks/dbtc/DbtcMain.cpp 1.110 vs edited =====
Index: ndb-work/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp
===================================================================
--- ndb-work.orig/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp	2007-06-29 17:35:57.311479506 +1000
+++ ndb-work/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp	2007-06-29 17:39:18.982972110 +1000
@@ -10489,7 +10489,9 @@ void Dbtc::releaseAbortResources(Signal*
   apiConnectptr.p->apiConnectstate = CS_ABORTING;
   apiConnectptr.p->abortState = AS_IDLE;
   releaseAllSeizedIndexOperations(apiConnectptr.p);
-  if(apiConnectptr.p->m_exec_flag || apiConnectptr.p->apiFailState == ZTRUE){
+  if(apiConnectptr.p->returnsignal ||
+     apiConnectptr.p->m_exec_flag  ||
+     apiConnectptr.p->apiFailState == ZTRUE){
     jam();
     bool ok = false;
     Uint32 blockRef = apiConnectptr.p->ndbapiBlockref;