downloader.test example fails to run

[Leo Arias]

Running the binary downloader.test in a recent all-snaps snappy image shows no output.

The snappy-debu scanlog shows:

= AppArmor =
Time: Feb 10 19:11:21
Log: apparmor="DENIED" operation="open" profile="downloader.sideload_test_IMNKLcfHYDBI" name="/etc/hosts" pid=1296 comm="test" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
File: /etc/hosts (read)
Suggestions:
* adjust program to read necessary files from SNAP_APP_PATH
* add '/etc/hosts' to 'read-paths' in security-override

= AppArmor =
Time: Feb 10 19:11:21
Log: apparmor="DENIED" operation="open" profile="downloader.sideload_test_IMNKLcfHYDBI" name="/run/resolvconf/resolv.conf" pid=1296 comm="test" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
File: /run/resolvconf/resolv.conf (read)
Suggestions:
* adjust program to use SNAP_APP_DATA_PATH
* adjust program to use /run/shm/snaps/SNAP_FULLNAME/SNAP_VERSION

= AppArmor =
Time: Feb 10 19:11:21
Log: apparmor="DENIED" operation="create" profile="downloader.sideload_test_IMNKLcfHYDBI" pid=1296 comm="test" family="inet" sock_type="dgram" protocol=0

[Impact]

 * For users, none.

 * The test is just installing the snap, not executing it. So a regression might be introduced in this code path.

[Test Case]

 * Run the snaps tests.

[Regression Potential]

 * The snaps tests might start failing. But they are run in the pull request and in the autopkgtest, so we are covered.

[Jamie Strandboge (jdstrand)]

This apparently doesn't have the 'network-client' old-security/cap applied. The recent changes wrt interfaces does not add 'network-client' if it isn't specified. It needs to be discussed if the new behavior is intentional or not and it not, how to move forward.

[Leo Arias (elopio)]

Thanks Jamie. A little late, but we are adding this test now.

https://github.com/ubuntu-core/snapcraft/pull/589