Code review comment for lp:~sergiusens/snapcraft/1501496

The attempt to merge lp:~sergiusens/snapcraft/1501496 into lp:snapcraft failed. Below is the output from the failed tests.

The project has gotten complex.
Here's the list of units exceeding 10:
- snapcraft/cmds.py:
  286:1: 'cmd' 13

name: # the name of the snap
version: # the version of the snap
# The vendor for the snap (replace 'Vendor <email address hidden>')
vendor: Vendor <email address hidden>
summary: # 79 char long summary
description: # A longer description for the snap
icon: # A path to an icon for the package
cp --preserve=all -R zzz /tmp/tmpib37ar12/parts/copy/install/zzz
cp --preserve=all -R src /tmp/tmpd55xvtps/parts/copy/install/dst
cp --preserve=all -R src /tmp/tmprcfoplg9/parts/copy/install/dir/dst

...................................Warning: unable to find "test_relexepath" in the path
..........................................F.........................
======================================================================
FAIL: test_get_part (snapcraft.tests.test_wiki.TestYaml)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/tarmac/branch.6kWKxD/snapcraft/tests/test_wiki.py", line 45, in test_get_part
    self.assertEqual(w.get_part('part1'), {'type': 'go'})
AssertionError: {} != {'type': 'go'}
- {}
+ {'type': 'go'}

----------------------------------------------------------------------
Ran 103 tests in 2.850s

FAILED (failures=1)