Add request parameter to only show bike park & ride routes using bike lockers

[leonardehrenfried]

Depends on #52

A user should have the ability to specify that she only wants to use a bike locker when searching for bike park & ride routes.

[flaktack]

This should be possible using #84

[leonardehrenfried]

Estimation: 1/2/1 days

[flaktack]

99 adds the required functionality to the ParkAPI updater:

• tags can be defined in router-config.json
• the forecast, lot_type, address and state tags are copied from the lot definition

Example tags:

      {
        "tags": [
          "lot_type:Fahrradabstellanlage",
          "address:Stuttgarter Str. 90-92",
          "forecast:false",
          "state:open",
          "bike-locker"
        ]
      },