Replace direct mysql_xxx() calls with query_xxx() calls. Replace calls to mysql_insert_id()

with calls specific to the appdb or bugzilla database. Fixes a bug where a call to
mysql_insert_id() can potentially retrieve an id from either the bugzilla or appdb database,
depending on whichever database was last opened by mysql_connect().

unit_test/run_tests.php

@@ -117,7 +117,7 @@ class table_counts
         {
             $sQuery = "select count(*) as cnt from ?;";
             $hResult = query_parameters($sQuery, $sTable);
-            $oRow = mysql_fetch_object($hResult);
+            $oRow = query_fetch_object($hResult);
 
             $this->aTableCounts[] = $oRow->cnt;
         }