AreasWithHighwayTagsCheck enhancements

[nachtm]

Description:

This is a series of enhancements to AreasWithHighwayTagsCheck.

• Previously, only areas were being checked. This missed out on a large number of OSM ways that were tagged with area=yes and some invalid highway value.
• In addition, there are some highway tags that are valid in conjunction with area=yes that were previously being flagged. Those are no longer flagged.
• Finally, instead of just flagging the particular edge in question, we gather all connected edges with improper combinations of area and highway tags. This makes the output of this check easier to understand for people who are familiar with OSM but not Atlas. This may also reduce the flag count in some cases, since connected improperly tagged edges will be flagged as a single unit now.

In short, the new logic is as follows: for any area or edge, if that object has an area=yes tag and a highway tag that is not one of {services, service, rest area, pedestrian, platform}, flag it and all connected edges that share a similar problem.

Potential Impact:

Changed flag counts for AreasWithHighwayTags.

Unit Test Approach:

Added unit tests to cover edges and a couple of new area cases.

Test Results:

All tests passing.

[jklamer]

One clean up ask. Looks good.