pbs: enforce LC_ALL=C (importer/exporter as well) for proper sort collation

to mark the purpose, repeat inside the call to /usr/bin/sort,
but it's also needed for messages (i.e. we don't want /bin/cp
to write unicode chars in the pubsub feed)

Move dcron test in dedicated directory/file.
Also move slapos/recipe/test to slapos/test.
Currently : only dcron test.

(cherry picked from commit 362c2f6b)

(cherry picked from commit a467c0f0)

also cleanup pt-* commands in mariadb instanciation.

runner: fix export of hidden files

runner.backup: segregation is enforced for hidden files

runner.backup: not one option to rule all rsync

runner.backup: forget rsync for hidden files use cp

runner: fix resiliency import script

because the default value changed from off to on in MySQL 5.6.6.

Add new variables used in testnode software.
Add new rules to httpd, in order to make depositories accessible
by obfuscation.

Conflicts:
	software/slaprunner/instance-runner.cfg

(better in development purposes)

while restoring a backup

for the deployment of the Software Release