ISPN-3279 Delete ConfigurationOverrides and GlobalConfigurationOverrides

JIRA - https://issues.jboss.org/browse/ISPN-3279

The following test classes were deleted as they required the use of the older API:

* ```InfinispanNamedEmbeddedCacheFactoryBeanContextTest```
* ```SpringEmbeddedCacheFactoryBeanContextTest```
* ```InfinispanEmbeddedCacheFactoryBeanContextTest```