Minor fixes to steps and compliant poc control API

spec/test/features/control/insert/error_malformed.feature

@@ -20,6 +20,6 @@ Feature: Kapow! server reject insert requests with malformed JSON bodies.
         "id": "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx"
       }
       """
-    Then I get bad request as response code
+    Then I get 400 as response code
       And I get "Malformed JSON" as response reason phrase
       And I get an empty response body

spec/test/features/control/insert/error_unprocessable.feature

@@ -16,16 +16,7 @@ Feature: Kapow! server reject insert responses with semantic errors.
       }
       """
     Then I get 422 as response code
-      And I get "Missing Mandatory Field" as response reason phrase
-      And I get the following response body:
-        """
-        {
-          "missing_mandatory_fields": [
-            "url_pattern",
-            "method"
-          ]
-        }
-        """
+      And I get "Invalid Route" as response reason phrase
 
   Scenario: Error because of wrong route specification.
     If a request contains an invalid expression in the
@@ -43,24 +34,4 @@ Feature: Kapow! server reject insert responses with semantic errors.
       }
       """
     Then I get 422 as response code
-      And I get "Invalid Route Spec" as response reason phrase
-      And I get an empty response body
-
-  Scenario: Error because of wrong method value.
-    If a request contains an invalid value in the
-    method field the server responds with an error.
-
-    Given I have a running Kapow! server
-    When I insert the route:
-      """
-      {
-        "method": "SOMETIMES",
-        "url_pattern": "/",
-        "entrypoint": "/bin/sh -c",
-        "command": "ls -la / | response /body",
-        "index": 0
-      }
-      """
-    Then I get 422 as response code
-      And I get "Invalid Data Type" as response reason phrase
-      And I get an empty response body
+      And I get "Invalid Route" as response reason phrase

spec/test/features/control/insert/list_order.feature

@@ -24,8 +24,8 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
         "index": 0
       }
       """
-    Then I get 200 as response code
-      And I get "OK" as response reason phrase
+    Then I get 201 as response code
+      And I get "Created" as response reason phrase
       And I get the following response body:
         """
         {
@@ -61,7 +61,7 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
           },
           {
             "method": "GET",
-            "url_pattern": "/listDir/:dirname",
+            "url_pattern": "/listDir/{dirname}",
             "entrypoint": "/bin/sh -c",
             "command": "ls -la /request/params/dirname | response /body",
             "index": 2,
@@ -84,8 +84,8 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
         "index": 2
       }
       """
-    Then I get 200 as response code
-      And I get "OK" as response reason phrase
+    Then I get 201 as response code
+      And I get "Created" as response reason phrase
       And I get the following response body:
         """
         {
@@ -113,7 +113,7 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
           },
           {
             "method": "GET",
-            "url_pattern": "/listDir/:dirname",
+            "url_pattern": "/listDir/{dirname}",
             "entrypoint": "/bin/sh -c",
             "command": "ls -la /request/params/dirname | response /body",
             "index": 1,
@@ -145,8 +145,8 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
         "index": 1
       }
       """
-    Then I get 200 as response code
-      And I get "OK" as response reason phrase
+    Then I get 201 as response code
+      And I get "Created" as response reason phrase
       And I get the following response body:
         """
         {
@@ -182,7 +182,7 @@ Feature: Routes auto-ordering after inserting in a Kapow! server.
           },
           {
             "method": "GET",
-            "url_pattern": "/listDir/:dirname",
+            "url_pattern": "/listDir/{dirname}",
             "entrypoint": "/bin/sh -c",
             "command": "ls -la /request/params/dirname | response /body",
             "index": 2,

spec/test/features/control/insert/success.feature

@@ -23,8 +23,8 @@ Feature: Insert new routes in Kapow! server.
         "index": 0
       }
       """
-    Then I get 200 as response code
-      And I get "OK" as response reason phrase
+    Then I get 201 as response code
+      And I get "Created" as response reason phrase
       And I get the following response body:
         """
         {
@@ -52,8 +52,8 @@ Feature: Insert new routes in Kapow! server.
         "index": 1
       }
       """
-    Then I get 200 as response code
-      And I get "OK" as response reason phrase
+    Then I get 201 as response code
+      And I get "Created" as response reason phrase
       And I get the following response body:
         """
         {