Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

We want avocado tests to not require specific directories,
the user should be able to arrange them in the dir structure
they see fit. Also, if a test requires data, we suppose their
data dir is located in the same directory as the source file,
with the name:

[modulename].data

Re arrange the test dir to reflect this new structure.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

Make the names used consistent between attributes and
methods inside the Test class.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

Preserve file permissions when extracting data from tarballs,
so in some tests we have we don't need to set permissions too.
Signed-off-by: NRuda Moura <rmoura@redhat.com>

Trinity is a popular linux system call wrapper

http://codemonkey.org.uk/projects/trinity/

By implementing it we noticed a number of shortcomings
with avocado that have to be fixed in order to provide
a smoother developer experience.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>