Remove nameStr from router

It isn't used anywhere in the code, so it can be removed, and the router
simplified.  These common data structures have caused problems, in that
they're not copied to child handlers, and cause bugs like #249.

Tested: Redfish service validator passes.  Basic sanity tests of both
static file routes such as $metadata (which use DynamicRule) as well as
method routes, such as /redfish/v1, return valid data.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I93ad74581912e18ee5db9aaa9ecdaf08ed765418