databases/cego: upgrade 2.45.0 -> 2.45.1

• Treated alias insert queries with empty schema, e.g. insert into a1 values ( 1, 'XXX');
• Some patches added for alias management to allow alias defintions as a subset of the original table, e.g. create table t1 ( a int, b string(10), c string(30)) create alias a1 on t1 ( a as ax, b as bx); This has required some fixes in CegoAliasObject::mapSchema and CegoQueryHelper::mapFLA

Submitted by: Bjoern Lemke <lemke@lemke-it.com>