Let -zapwallettxes recover transaction meta data

qa/rpc-tests/util.sh

@@ -38,6 +38,10 @@ function AssertEqual {
   if (( $( echo "$1 == $2" | bc ) == 0 ))
   then
     echoerr "AssertEqual: $1 != $2"
+    declare -f CleanUp > /dev/null 2>&1
+    if [[ $? -eq 0 ]] ; then
+        CleanUp
+    fi
     exit 1
   fi
 }
@@ -49,6 +53,10 @@ function CheckBalance {
   if (( $( echo "$B == $EXPECT" | bc ) == 0 ))
   then
     echoerr "bad balance: $B (expected $2)"
+    declare -f CleanUp > /dev/null 2>&1
+    if [[ $? -eq 0 ]] ; then
+        CleanUp
+    fi
     exit 1
   fi
 }