New unit test fixes

New unit test fixes following sentences
He runs more often than John.
He runs less often than John.
He runs here more often than John.
He runs here less often than John.
He is faster than John.

@linas We are trying to mark "more" as the comparative RelEx relation type to make it consistent. For example,

He is more intelligent than the robots. 

==> more(he, intelligent)

So for the sentences that without "more", we use "_more". For example:

He runs faster than the robots.

==> _more(run, fast)

If you think "more" or "_more" is a bad relation type name, we can change that to "_comparative"...