GS-11758:

Quick win: Two new wrappers were created for the UrlSpaceConfigurer (for embedded and remote spaces) to simplify space configuration (no ugly URL prefix needed!).
* Added FactorBean, Configurer, BeanDefinitionParser for SpaceProxy (remote) and EmbeddedSpace
* Added new elements "space-proxy" and "embedded-space" to openspaces-core schema
 ** "space-proxy" is a subset of the regular "space" element in terms of sub-elements and attributes, while "embedded-space" is nearly identical to "space"
 ** Both new elements have a "name" attribute instead of "url"

git-svn-id: svn://pc-lab14/SVN/xap/trunk/openspaces@183241 eb64e737-3616-4df0-8941-5ee2ae88103d