Fix titles for Java tabs in Testing chapter of reference manual

Author: sbrannen

framework-docs/modules/ROOT/pages/testing/testcontext-framework/ctx-management/web-mocks.adoc

@@ -20,7 +20,7 @@ managed per test method by the `ServletTestExecutionListener`.
 
 [tabs]
 ======
-Injecting mocks::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----

framework-docs/modules/ROOT/pages/testing/testcontext-framework/ctx-management/web.adoc

@@ -29,9 +29,10 @@ The remaining examples in this section show some of the various configuration op
 loading a `WebApplicationContext`. The following example shows the TestContext
 framework's support for convention over configuration:
 
+.Conventions
 [tabs]
 ======
-Conventions::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----
@@ -76,9 +77,10 @@ as the `WacTests` class or static nested `@Configuration` classes).
 The following example shows how to explicitly declare a resource base path with
 `@WebAppConfiguration` and an XML resource location with `@ContextConfiguration`:
 
+.Default resource semantics
 [tabs]
 ======
-Default resource semantics::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----
@@ -118,9 +120,10 @@ whereas `@ContextConfiguration` resource locations are classpath based.
 The following example shows that we can override the default resource semantics for both
 annotations by specifying a Spring resource prefix:
 
+.Explicit resource semantics
 [tabs]
 ======
-Explicit resource semantics::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----

framework-docs/modules/ROOT/pages/testing/testcontext-framework/web-scoped-beans.adoc

@@ -47,9 +47,10 @@ the provided `MockHttpServletRequest`. When the `loginUser()` method is invoked
 set parameters). We can then perform assertions against the results based on the known
 inputs for the username and password. The following listing shows how to do so:
 
+.Request-scoped bean test
 [tabs]
 ======
-Request-scoped bean test::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----
@@ -124,9 +125,10 @@ the user service has access to the session-scoped `userPreferences` for the curr
 `MockHttpSession`, and we can perform assertions against the results based on the
 configured theme. The following example shows how to do so:
 
+.Session-scoped bean test
 [tabs]
 ======
-Session-scoped bean test::
+Java::
 +
 [source,java,indent=0,subs="verbatim,quotes",role="primary"]
 ----