[MONDRIAN-1770] Addressed issue with dimensions with no key defined in the schema.  Omitting the key is valid in the case of degenerate dimensions, in which case
there should be one dimension attribute.
[MONDRIAN-1770] Externalized message from previous commit.
Merge pull request #179 from mkambol/qbMerge

[MONDRIAN-1770] Addressed issue with dimensions with no key defined in t...