Added @wip tag to features and fix name length issues

spec/test/features/data/handler/error_invalidresource.feature

@@ -1,8 +1,8 @@
+@wip
 Feature: Fail to retrieve an invalid resource for a handler in Kapow! server.
   If trying to access an invalid resource for a handler
   then the server responds with an error.
 
-  @wip
   Scenario: Try to get invented/path from a existent handler.
     A request for retrieving an invalid resource for an
     existent handler will trigger a invalid resource error.

spec/test/features/data/handler/error_notfound.feature

@@ -1,8 +1,8 @@
+@wip
 Feature: Fail to retrieve resources from nonexistent handler in Kapow! server.
   If trying to access a nonexistent handler then the
   server responds with a noptfound error.
 
-  @wip
   Scenario: Try to get a valid resource from a nonexistent handler.
     A request for retrieving a resource from a nonexistent
     handler will trigger a not found error.
@@ -10,11 +10,10 @@ Feature: Fail to retrieve resources from nonexistent handler in Kapow! server.
     Given I have a Kapow! server with the following routes:
       | method | url_pattern        | entrypoint | command                    |
       | GET    | /listRootDir       | /bin/sh -c | ls -la / \| response /body |
-    When I the get the resource "request/path" for the handler with id HANDLER_ID_XXXXXXXXXX
+    When I get the resource "request/path" for the handler with id XXXXXXXXXX
     Then I get 404 as response code
       And I get "Not Found" as response reason phrase
 
-  @wip
   Scenario: Fail to get an invalid resource from a nonexistent handler.
     A request for retrieving a resource from a nonexistent
     handler will trigger a not found error even if the
@@ -23,6 +22,6 @@ Feature: Fail to retrieve resources from nonexistent handler in Kapow! server.
     Given I have a Kapow! server with the following routes:
       | method | url_pattern        | entrypoint | command                    |
       | GET    | /listRootDir       | /bin/sh -c | ls -la / \| response /body |
-    When I the get the resource "invented/path" for the handler with id HANDLER_ID_XXXXXXXXXX
+    When I get the resource "invented/path" for the handler with id XXXXXXXXXX
     Then I get 404 as response code
       And I get "Not Found" as response reason phrase

spec/test/features/data/handler/success.feature

@@ -1,9 +1,9 @@
+@wip
 Feature: Retrieve a resource from a handler in Kapow! server.
     Users can retrieve request handler resources
     from the server by specifying the handler id
     and the resource path.
 
-  @wip
   Scenario: Retrieve a resource for the current request.
     Get the "request/path" resource for the current
     request through the handler id.