[VOL-5358] - misc edits needed to support repo:onf-make use.

config.mk
---------
  - Simple copyright notice update.

makefiles/commands/include.mk
makefiles/commands/kubectl/include.mk
-------------------------------------y
  - Added a central installer for the kubectl command.
  - Rename commands 'help::' target to commands-help.
  - Default help is growing long in the stream.

makefiles/commands/kail/include.mk
makefiles/commands/pre-commit/
makefiles/commands/tox/tox.mk
----------------------------------
  - Update copyright notice
  - Changed default help target to target commands-help and define
    {command-name}-help for individual targets.  Default help target
    is beginning to grow long displaying everything.

makefiles/docker/include.mk
---------------------------
  - Update include docker config file (directory mount paths) to also load
    the config from lf/local/docker/config/include.mk to avoid storing
    all custom repo configs in repo:onf-make.

Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
Change-Id: I075be7c710bd7308ce258109455cc2ea2a3ae780
diff --git a/makefiles/docker/include.mk b/makefiles/docker/include.mk
index 958cd35..1561782 100644
--- a/makefiles/docker/include.mk
+++ b/makefiles/docker/include.mk
@@ -22,14 +22,24 @@
 
 $(if $(DEBUG),$(warning ENTER))
 
-# Per-repository
-include $(onf-mk-dir)/docker/config/$(--repo-name--).mk
-
 # ------------------- ##
 # ---]  GLOBALS  [--- ##
 # ------------------- ##
 VOLTHA_TOOLS_VERSION ?= 2.4.0
 
+# -------------------- ##
+# ---]  INCLUDES  [--- ##
+# -------------------- ##
+# include $(onf-mk-dir)/docker/help.mk
+
+# -----------------------------------------------------------------------
+# Load per-repository config: docker mount points, etc
+# -----------------------------------------------------------------------
+include $(firstword $(wildcard \
+  $(local-mk-dir)/docker/config/include.mk \
+  $(onf-mk-dir)/docker/config/$(--repo-name--).mk \
+))
+
 # ---------------------------------
 # Induce error for misconfiguration
 # ---------------------------------