FIX: Allow threads to be killed when max started threads reached.

Thank you, CDE.
Fix memleak in action_rules_motor

Thank you, RNI.
Fix meta2v2 crash when events enabled

(TO-HONEYCOMB-718)

Thank you, FVE.
Fix check of content with no explicit storage policy

Thank you, FVE.
Fix re-creation of container from orphan chunk

Remove _replace_sysmd_date() which was pointless and made
the thing crash when no meta2 was linked to the container.

Thank you, FVE.
Change socket timeout to rawx + proper error code upon timeout.

New default value + config parameter.
504 error now returned if connection between rainx and rawx time out.

Thank you, CCA.
Fixes around around and metadata.

FIX: gs_upload_content_v2 correctly send mdusr
FIX: mdusr are now correctly set while using gs_uplaod_content_v2
ADD: method gs_upload which allow mdusr & stgpol

Thank you, CDE.