Add localized site type support in kernel

This issue is related to SAK-26004.
Since it seems no way to make KNL issue as a sub-task of SAK issue, I have to create this issue directly.

The detail can be found in SAK-26004.

Refer to org.sakaiproject.tool.impl.ToolImpl.getDescription(), I will use the same way to support localized site type.
So a getLocalizedType() function is added to Site to get the localized value.
Besides, a getLocalizedSiteType(String siteType) function is added to SiteService to support it.

Two interfaces were changed, some related class should be modified accordingly.

Some properties file should be added first. These changes can be found in SAK-26005.

The patch is based on 1.3.x branch