Update Postgis to 2.2
Update Postgis to 2.2

To fix provisioning errors. Parallel to https://github.com/WikiWatershed/model-my-watershed/commit/ce348bc00cb1e71c33ce240eff92e611a9e1a08a

project-icp/bee-pollinator-app,project-icp/bee-pollinator-app,project-icp/bee-pollinator-app,project-icp/bee-pollinator-app