add pending to failing validation tests

[elrayle]

Also...

• fixes typo in position and removes duplicate test
• splits LOC_RWO into 3 sets of tests of about 9 tests each
• changes subject_uri of RDA_REGISTRY/colour_content q=polychrome, but may be an incorrect change. See notes below...

Not sure of the subject URI for RDA_REGISTRY polychrome search in subauth colour_content. I'm seeing different URIs in LD4P/qa_server and cult-it/qa_server. Both versions fail.

    subject_uri: "http://rdaregistry.info/termList/RDAColourContent/1003"   
    subject_uri: "http://rdaregistry.info/termList/RDACartoDT/1003"