Merge pull request #13438 from wangkx/h23631

HPCC-23631 Build correct WU search filter

Reviewed-By: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>

esp/services/ws_workunits/ws_workunitsService.cpp

@@ -1724,7 +1724,10 @@ bool addWUQueryFilter(WUSortField *filters, unsigned short &count, MemoryBuffer
         return false;
     filters[count++] = value;
     if ((value & WUSFwild) != 0 && !containsWildcard(name))
-        buff.append("*").append(name).append("*");
+    {
+        VStringBuffer s("*%s*", name);
+        buff.append(s);
+    }
     else
         buff.append(name);
     return true;