Fix GeocodeAttributeValueTest failures.

+ Pass $delta to numeric comparison in address lookup where accuracy is not perfect.
+ Use regexp match for string comparison in address lookup where accuracy is not perfect.
+ Swap $expected and $actual around to the right order (expected first, then actual).
+ Add test messages.
Merge pull request #102 from leftclickben/PROV-914

PROV-914 Fix GeocodeAttributeValueTest