Added RunTask acceptance tests

Added a basic RunTask test to test the functionality of the new aptly
task run command. More to come...

system/t10_task/RunTask1Test_gold

@@ -0,0 +1,34 @@
+1) [Running]: repo list
+
+Begin command output: ----------------------------
+ 
+No local repositories found, create one with `aptly repo create ...`.
+
+End command output: ------------------------------
+ 
+2) [Running]: repo create local
+
+Begin command output: ----------------------------
+ 
+
+Local repo [local] successfully added.
+You can run 'aptly repo add local ...' to add packages to repository.
+
+End command output: ------------------------------
+ 
+3) [Running]: repo drop local
+
+Begin command output: ----------------------------
+ 
+Local repo `local` has been removed.
+
+End command output: ------------------------------
+ 
+4) [Running]: version
+
+Begin command output: ----------------------------
+ 
+aptly version: 0.8~dev
+
+End command output: ------------------------------
+ 

system/t10_task/__init__.py

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+"""
+Test aptly task run
+"""
+
+from .run import *

system/t10_task/run.py

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+from lib import BaseTest
+
+
+class RunTask1Test(BaseTest):
+  """
+  output should match
+  """
+
+  runCmd = "aptly task run repo list, repo create local, repo drop local, version"