ProcessHelper: log run subprocesses in run_subprocess_x

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Archive: remove unused import

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Consolidate logging when running subprocess

Don't log return code anywhere else, but in the
run_subprocess_xxx function.
Also modify run_subprocess calls where needed,
to comply with the rest of the project.

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Fix typos and formatting errors

Signed-off-by: Tomas Hozza <thozza@redhat.com>
VimDiffTool: raise NotImplemented instead of pass

Signed-off-by: Tomas Hozza <thozza@redhat.com>
PatchHelper: Modify the Base class and matching to match with the rest of project

Signed-off-by: Tomas Hozza <thozza@redhat.com>
PatchHelper: remove unused temp_name var and related code

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Application: Fix typos

Signed-off-by: Tomas Hozza <thozza@redhat.com>
PkgDiffTool: Don't print pkgdiff output to stdout

Signed-off-by: Tomas Hozza <thozza@redhat.com>