specdep: Fix Pylint warnings

Signed-off-by: Euan Harris <euan.harris@citrix.com>
test_specdep: Fix Pylint line length warnings

Signed-off-by: Euan Harris <euan.harris@citrix.com>
test_pkg: Rename tests/SPECS to tests/data

Signed-off-by: Euan Harris <euan.harris@citrix.com>
test_pkg: Use unittest's assertEqual() instead of plain assert

Signed-off-by: Euan Harris <euan.harris@citrix.com>
Merge pull request #381 from euanh/spec-wrapper

Fix pylint warnings in tests