Analyzer - Change the color of nodes according to the number of expected routes

[pyrog]

Currently all nodes are green.

Use i.e. the following colors:

• gray if the node don't have the tag expected_xxn_route_relations
• red if all of the expected routes are missing
• yellow if one (or more) of the expected routes is missing or the the node have more routes than the expected number.
• green if all expected routes are mapped

• Abri du Contrat could be yellow
• Le Contrat Ouest could be gray or red (no route and expected routes aren't set)