Updates due to go_xref schema change

modules/t/test-genome-DBs/homo_sapiens/core/go_xref.sql

 CREATE TABLE `go_xref` (
   `object_xref_id` int(10) unsigned NOT NULL default '0',
-  `linkage_type` enum('IC','IDA','IEA','IEP','IGI','IMP','IPI','ISS','NAS','ND','TAS','NR', 'RCA') collate latin1_bin NOT NULL default 'IC',
-  UNIQUE KEY `object_xref_id_2` (`object_xref_id`,`linkage_type`),
-  KEY `object_xref_id` (`object_xref_id`)
-) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin;
-
+  `linkage_type` enum('IC','IDA','IEA','IEP','IGI','IMP','IPI','ISS','NAS','ND','TAS','NR','RCA') NOT NULL,
+  `source_xref_id` int(10) unsigned default NULL,
+  UNIQUE KEY `object_xref_id_2` (`object_xref_id`,`source_xref_id`,`linkage_type`),
+  KEY `object_xref_id` (`object_xref_id`),
+  KEY `source_xref_id` (`source_xref_id`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;

modules/t/test-genome-DBs/homo_sapiens/core/go_xref.txt

-22988	IC
-22988	IEA
-22989	IEA
-22990	IC
-22991	IEA
-22992	IC
-22993	IEA
-22994	IC
-41176	IEA
-41177	IDA
-41178	IEA
-41179	IC
-41180	IEA
-41181	IEA
-41182	IDA
-41183	IC
-83268	IEA
-83269	IEA
-83270	IDA
-149843	IDA
-151219	IDA
-151220	IC
-151221	IDA
-151222	IC
-151223	IEA
-151224	IC
-179294	IDA
-179295	IEA
-179296	IC
-191222	IEA
-191223	IC
-191224	IC
-191225	IC
-191226	IDA
-191227	IDA
-191244	IEA
-191245	IDA
-191246	IC
-229064	IDA
-229065	IC
-229077	IDA
-229078	IC
-238791	IC
-238792	IDA
-238793	IDA
-238794	IC
-238795	IDA
-238796	IEA
-238797	IDA
+22988	IC	\N
+22988	IEA	\N
+22989	IEA	\N
+22990	IC	\N
+22991	IEA	\N
+22992	IC	\N
+22993	IEA	\N
+22994	IC	\N
+41176	IEA	\N
+41177	IDA	\N
+41178	IEA	\N
+41179	IC	\N
+41180	IEA	\N
+41181	IEA	\N
+41182	IDA	\N
+41183	IC	\N
+83268	IEA	\N
+83269	IEA	\N
+83270	IDA	\N
+149843	IDA	\N
+151219	IDA	\N
+151220	IC	\N
+151221	IDA	\N
+151222	IC	\N
+151223	IEA	\N
+151224	IC	\N
+179294	IDA	\N
+179295	IEA	\N
+179296	IC	\N
+191222	IEA	\N
+191223	IC	\N
+191224	IC	\N
+191225	IC	\N
+191226	IDA	\N
+191227	IDA	\N
+191244	IEA	\N
+191245	IDA	\N
+191246	IC	\N
+229064	IDA	\N
+229065	IC	\N
+229077	IDA	\N
+229078	IC	\N
+238791	IC	\N
+238792	IDA	\N
+238793	IDA	\N
+238794	IC	\N
+238795	IDA	\N
+238796	IEA	\N
+238797	IDA	\N