The rsyslog Makefile test target has errors

The "test" target of the rsyslog Makefile fails in the automated tests. This causes rsyslog to fail in the report section, we should change the test target to work.

Here is the debug log from the automated tests.

DEBUG:runner:call ['/usr/bin/make', '-s', 'test']
DEBUG:runner:
Downloading/unpacking Jinja2 (from -r test_requirements.txt (line 1))
  Running setup.py (path:/home/ubuntu/charms/trusty/rsyslog/.venv/build/Jinja2/setup.py) egg_info for package Jinja2

    warning: no files found matching '*' under directory 'custom_fixers'
    warning: no previously-included files matching '*' found under directory 'docs/_build'
    warning: no previously-included files matching '*.pyc' found under directory 'jinja2'
    warning: no previously-included files matching '*.pyc' found under directory 'docs'
    warning: no previously-included files matching '*.pyo' found under directory 'jinja2'
    warning: no previously-included files matching '*.pyo' found under directory 'docs'
Downloading/unpacking PyYAML (from -r test_requirements.txt (line 2))
  Running setup.py (path:/home/ubuntu/charms/trusty/rsyslog/.venv/build/PyYAML/setup.py) egg_info for package PyYAML

Downloading/unpacking coverage (from -r test_requirements.txt (line 3))
  Running setup.py (path:/home/ubuntu/charms/trusty/rsyslog/.venv/build/coverage/setup.py) egg_info for package coverage

    warning: no previously-included files matching '*.pyc' found anywhere in distribution
Downloading/unpacking mock==1.0.1 (from -r test_requirements.txt (line 4))
  Running setup.py (path:/home/ubuntu/charms/trusty/rsyslog/.venv/build/mock/setup.py) egg_info for package mock

    warning: no files found matching '*.png' under directory 'docs'
    warning: no files found matching '*.css' under directory 'docs'
    warning: no files found matching '*.html' under directory 'docs'
    warning: no files found matching '*.js' under directory 'docs'
Downloading/unpacking nose==1.3.1 (from -r test_requirements.txt (line 5))
  Running setup.py (path:/home/ubuntu/charms/trusty/rsyslog/.venv/build/nose/setup.py) egg_info for package nose

    no previously-included directories found matching 'doc/.build'
Downloading/unpacking python-apt (from -r test_requirements.txt (line 6))
  Could not find any downloads that satisfy the requirement python-apt (from -r test_requirements.txt (line 6))
  Some externally hosted files were ignored (use --allow-external python-apt to allow).
Cleaning up...
No distributions at all found for python-apt (from -r test_requirements.txt (line 6))
Storing debug log for failure in /tmp/tmpuSymbz
make: *** [test] Error 1

DEBUG:runner:Exit Code: 2
    make test