Aol control overview map component layer injection

[remiHau]

In ControlOverviewMapComponent, the layers pass to the control is done with a layers input and it is not possible to pass the layer with content projection which is a different behaviour than in the rest of the library.

Moreover the overviewMapControl of openlayers is not dynamic and it is only possible to pass layers during the construction of the control.

Possibilites are :

• Keep the current behaviour and documentate why it is different
• Doing content projection if if it means destroy and reconstruct the control
• Modify openlayers libs to add the possibility to change dynamically the layers and add the getLayers and setLayers methods
• Others ideas?