SOC-3756 | UISpaceNavigationPortlet: Slowness in getLastAccessedSpace

Conflicts:
	component/core/src/main/java/org/exoplatform/social/core/storage/impl/SpaceStorageImpl.java
	component/webui/src/main/java/org/exoplatform/social/webui/Utils.java
SOC-3756 | UISpaceNavigationPortlet: Slowness in getLastAccessedSpace - fixed unit test failed