NEW: RequestHandler - getServiceOption() to properly resolve inherited
options in the global service handler initialize method
NEW: FileCatalogHandler, StorageElementHandler - use getServiceOption()
Merge pull request #1581 from atsareg/fix-v6r8

[v6r8] RequestHandler - added getServiceOption()
v6r8p26
Conflicts resolved after merging with rel-v6r8
Conflicts resolved after merging with rel-v6r9