Following on from GitLab issue cta/CTA#371, replaced INTEGER with NUMERIC(20,...

Following on from GitLab issue cta/CTA#371, replaced INTEGER with NUMERIC(20, 0) within mysql_catalogue_schema_header.sql

catalogue/mysql_catalogue_schema_header.sql

 CREATE TABLE ARCHIVE_FILE_ID(
-  ID INTEGER,
+  ID NUMERIC(20, 0),
   CONSTRAINT ARCHIVE_FILE_ID_PK PRIMARY KEY(ID)
 );
 INSERT INTO ARCHIVE_FILE_ID(ID) VALUES(1);
 CREATE TABLE STORAGE_CLASS_ID(
-  ID INTEGER,
+  ID NUMERIC(20, 0),
   CONSTRAINT STORAGE_CLASS_ID_PK PRIMARY KEY(ID)
 );
 INSERT INTO STORAGE_CLASS_ID(ID) VALUES(1);