Changes

[Enhancement#310] Add first acceptance test for generic abstract entity classes.
 (commit: 72d3351)

[Enhancement#310] Defer initialization of fields with type variable in generic entity classes.
 (commit: b80dcb5)

[Enhancement #310] Extend AbstractIdentifiableType to support generic attributes with subtypes specifying concrete type.
 (commit: ca47d67)

[Enhancement #310] Use subtypes with concrete generic types when building metamodel for generic abstract supertypes.
 (commit: 1da6ffd)

[Enhancement #310] Support multiple generic types for an entity class.
 (commit: 5f2626a)

[Ref] Remove skipping logging of static fields when building metamodel

Used to be there for AspectJ static fields, but we no longer need that.
 (commit: ca31811)

[Ref] Remove unnecessary field.setAccessible call in metamodel building.
 (commit: 8394995)

[Enhancement #310] Support generic types in query attributes.
 (commit: 250ae0d)

[Enhancement #310] Add documentation of generic attribute resolution mechanism, minor code improvements.
 (commit: 62124d7)

[Enhancement #310] Add an integration test for generic entity classes.
 (commit: e69ab65)