Tests failing on sybase157:
org.hibernate.envers.test.integration.collection.embeddable.EmbeddableMap
org.hibernate.envers.test.integration.ids.embeddedid.RelationInsideEmbeddableTest

Example output:

10:18:27,341 DEBUG SQL:104 - create table EmbMapEnt (id int not null, primary key (id)) lock datarows
10:18:27,398 DEBUG SQL:104 - create table EmbMapEnt_AUD (id int not null, REV int not null, REVTYPE smallint null, primary key (id, REV)) lock datarows
10:18:27,452 DEBUG SQL:104 - create table EmbMapEnt_map (EmbeddableMapEntity_id int not null, audComp_description varchar(255) null, audComp_key varchar(255) null, audComp_value varchar(255) null, notAudComp_description varchar(255) null, notAudComp_key varchar(255) null, notAudComp_value varchar(255) null, str1 varchar(255) null, componentMap_KEY varchar(255) null, primary key (EmbeddableMapEntity_id, componentMap_KEY)) lock datarows
10:18:27,494 ERROR SchemaExport:425 - HHH000389: Unsuccessful: create table EmbMapEnt_map (EmbeddableMapEntity_id int not null, audComp_description varchar(255) null, audComp_key varchar(255) null, audComp_value varchar(255) null, notAudComp_description varchar(255) null, notAudComp_key varchar(255) null, notAudComp_value varchar(255) null, str1 varchar(255) null, componentMap_KEY varchar(255) null, primary key (EmbeddableMapEntity_id, componentMap_KEY)) lock datarows
10:18:27,494 ERROR SchemaExport:426 - Column 'componentMap_KEY' is part of a primary key constraint and cannot be null.

The map key ("componentMap_KEY") should not be nullable.