Introduce new flag -force-components to aptly mirror create to ignore

components in Release file while doing checks. #147

system/t04_mirror/CreateMirror28Test_gold

@@ -0,0 +1,4 @@
+Downloading http://downloads-distro.mongodb.org/repo/ubuntu-upstart/dists/dist/Release...
+
+Mirror [mirror28]: http://downloads-distro.mongodb.org/repo/ubuntu-upstart/ dist successfully added.
+You can run 'aptly mirror update mirror28' to download repository contents.

system/t04_mirror/CreateMirror28Test_mirror_show

@@ -0,0 +1,20 @@
+Name: mirror28
+Archive Root URL: http://downloads-distro.mongodb.org/repo/ubuntu-upstart/
+Distribution: dist
+Components: 10gen
+Architectures: amd64, i386
+Download Sources: no
+Download .udebs: no
+Last update: never
+
+Information from release file:
+Architectures: i386 amd64
+Codename: dist
+Components: mongodb
+Date: Tue, 04 Nov 2014 00:04:56 UTC
+Description:  mongodb packages
+
+Label: mongodb
+Origin: mongodb
+Suite: mongodb
+Version: dist

system/t04_mirror/CreateMirror4Test_gold

@@ -1,2 +1,2 @@
 Downloading http://mirror.yandex.ru/debian/dists/wheezy/Release...
-ERROR: unable to fetch mirror: component life not available in repo [mirror4]: http://mirror.yandex.ru/debian/ wheezy
+ERROR: unable to fetch mirror: component life not available in repo [mirror4]: http://mirror.yandex.ru/debian/ wheezy, use -force-components to override

system/t04_mirror/create.py

@@ -317,3 +317,14 @@ class CreateMirror27Test(BaseTest):
     def check(self):
         self.check_output()
         self.check_cmd_output("aptly mirror show mirror27", "mirror_show")
+
+
+class CreateMirror28Test(BaseTest):
+    """
+    create mirror: -force-components
+    """
+    runCmd = "aptly mirror create -ignore-signatures -force-components mirror28 http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen"
+
+    def check(self):
+        self.check_output()
+        self.check_cmd_output("aptly mirror show mirror28", "mirror_show")