Unwrap TypeVariables before calling .equals()

Update ResolvableType to unwrap Serialization wrapped TypeVariables
before calling the equals method.

This protects against the recent change in OpenJDK 8 (build 124)
which changed the TypeVariableImpl equals method such that it only
matches against other TypeVariableImpl instances.

Issue: SPR-11342
Temporarily deactivated Undertow integration tests

Undertow tests fail against OpenJDK 8 build 124 with a BindException.
Switched 'order' attributes across namespaces to 'xsd:token'

Issue: SPR-10886
Issue: SPR-7342
Remove serialVersionUIDs in spring-messaging Exc.

Prior to this commit, several spring-messaging exceptions
had defined serialVersionUIDs. Those exception aren't
supposed to leave the system via Java serialization; also,
their deserialization is supported only against the same
version of Spring.

Issue: SPR-11339