Add close() procedure for RpcServer.

Fixed tests to stop/close server.

eth-rpc/server.nim

@@ -165,6 +165,11 @@ proc stop*(server: RpcServer) =
   for item in server.servers:
     item.stop()
 
+proc close*(server: RpcServer) =
+  ## Cleanup resources of RPC server.
+  for item in server.servers:
+    item.close()
+
 # Server registration and RPC generation
 
 proc register*(server: RpcServer, name: string, rpc: RpcProc) =

tests/testethcalls.nim

@@ -72,3 +72,6 @@ suite "Generated from signatures":
     check sigResults[0] == "Nimbus-RPC-Test"
   test "SHA3":
     check sigResults[1] == "0x47173285A8D7341E5E972FC677286384F802F8EF42A5EC5F03BBFA254CB01FAD"
+
+server.stop()
+server.close()

tests/testrpcmacro.nim

@@ -132,3 +132,6 @@ suite "Server types":
       # wrong param type
       let res = waitFor rpcDifferentParams(%[%"abc", %1])
       # TODO: When errors are proper return values, check error for param name
+
+s.stop()
+s.close()

tests/testserverclient.nim

@@ -15,4 +15,7 @@ waitFor client.connect("localhost", Port(8545))
 suite "Server/Client RPC":
   test "Custom RPC":
     var r = waitFor client.call("myProc", %[%"abc", %[1, 2, 3, 4]])
-    check r.result.getStr == "Hello abc data: [1, 2, 3, 4]"
+    check r.result.getStr == "Hello abc data: [1, 2, 3, 4]"
+
+srv.stop()
+srv.close()