gitlab: Update software to gitlab 8.6

Update GitLab software to

    - gitlab-ce 8.6.9 + NXD patches

      nexedi/gitlab-ce!1

    - gitlab-shell to 2.6.12 + 1 patch to remove unneeded hooks.old in *.git

      nexedi/gitlab-shell!1

    - gitlab-workhorse 0.7.1 + NXD patches.

      nexedi/gitlab-workhorse!1

      ( download speedup patches were reworked because of upstream changes.
	Please see details in the above MR and in fixup commits )

This only updates software and begins SR update to 8.6 - for now gitlab
instance becomes non-working -- we'll pull in configuration files
updates and fixups in the following patches.

software/gitlab/software.cfg

@@ -113,26 +113,25 @@ git-executable = ${git:location}/bin/git
 <= git-repository
 #repository = https://gitlab.com/gitlab-org/gitlab-ce.git
 repository = https://lab.nexedi.com/nexedi/gitlab-ce.git
-# 8.5.X + NXD patches:
-revision = v8.5.3-15-g827d39147af496bcd4696c845e9094a07b5a09d3
+# 8.6.X + NXD patches:
+revision = v8.6.9-9-g1aafce0d0634afa9b3cfaf1e3a5b090c8c980076
 location = ${buildout:parts-directory}/gitlab
 
 [gitlab-shell-repository]
 <= git-repository
 #repository = https://gitlab.com/gitlab-org/gitlab-shell.git
 repository = https://lab.nexedi.com/nexedi/gitlab-shell.git
-# gitlab 8.5 wants gitlab-shell 2.6.10
-# 2.6.10 + no-hooks.old patch
-revision = v2.6.10-13-gcb8f331c955aa780efe10263d0d45b332f030f42
+# gitlab 8.6 wants gitlab-shell 2.6.12
+# 2.6.12 + NXD patches
+revision = v2.6.12-1-g03df9d7f9cfaa9e058f4c7053a497069b9b52657
 location = ${buildout:parts-directory}/gitlab-shell
 
 [gitlab-workhorse-repository]
 <= git-repository
 #repository = https://gitlab.com/gitlab-org/gitlab-workhorse.git
 repository = https://lab.nexedi.com/nexedi/gitlab-workhorse.git
-# 0.6.4 + NXD patches for blob download speedup
-# (https://gitlab.com/gitlab-org/gitlab-workhorse/merge_requests/17)
-revision = v0.6.4-3-g32ec77c4db3556dc66e8c863326325f8ec970849
+# 0.7.1 + NXD patches
+revision = v0.7.1-5-gd23a3247829fc3200e3dc784dcd57b5a0febac48
 location = ${buildout:parts-directory}/gitlab-workhorse