Handle template create in subgraph watcher during reorgs

[nikugogoi]

Part of Handle template create events processing during reorgs and Watcher ETH JSON-RPC wrapper

• Remove existing watched contract when encountered during template create in subgraph watcher
  • Reprocess block without existing watched contract
  • Scenario arises during reorgs with block events resulting to subgraph template create
• Apply GQL and RPC server middlewares ordered on requested paths
  • Apply the one with more path segments first to avoid it's requests getting directed to the other