When the expected-response-type was Serializable,
no Accept: header was added.
The SerializingHttpMessageConverter overrides
canRead() from the superclass.
The superclass method allows null in the mediaType
parameter to return true. RestTemplate.AcceptHeaderRequestCallback
calls canRead() with null in the mediaType, preventing
the Accept header from being completed.
Remove the overridden method.
INT-2837 Disable Java Serialization over Http
Previously, Java serialization was enabled by default by
adding the SerializingHttpMessageConverter to the converter
lists (inbound and outbound endpoints). However, there was
a problem in that the Accept header was not set properly on
outbound requests.
Correcting the header could cause other side effects, such as
existing JSON applications using Java serialization instead.
It was felt that it would be safest to disable Java serialization
by default, while retaining the ability to use Java serialization
by explicitly configuring the message converter.
Update tests to deal with the fact the converter is not
configured by default.
INT-2837 Fix Schema Version in Test
Inadvertently added a spring 3.1 schema version.
7ef66e2e3f