[18.09 backport] bump docker-credential-helpers v0.6.3

[thaJeztah]

"WIP" because this is based on top of #1961

backport of #1935 and #2006

full diff: docker/docker-credential-helpers@5241b46...8a9f93a

includes:

• C.free(unsafe.Pointer(err)) -> C.g_error_free(err) docker-credential-helpers#29 C.free(unsafe.Pointer(err)) -> C.g_error_free(err)
• pass: changed the way for checking if password-store is initalized docker-credential-helpers#124 pass: changed the way for checking if password-store is initalized
  • addresses docker-credential-pass commits about 10 times every time I run a docker command docker-credential-helpers#133 docker-credential-pass commits about 10 times every time I run a docker command
• Fix docker-credential-osxkeychain list behaviour in case of missing entry in keychain docker-credential-helpers#143 Fix docker-credential-osxkeychain list behaviour in case of missing entry in keychain
• make docker-credential-wincred work like docker-credential-osxkeychain docker-credential-helpers#139 make docker-credential-wincred work like docker-credential-osxkeychain

bump v0.6.3:

full diff: docker/docker-credential-helpers@v0.6.2...v0.6.3

[codecov-io]

Codecov Report

Merging #1984 into 18.09 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            18.09    #1984   +/-   ##
=======================================
  Coverage   54.29%   54.29%           
=======================================
  Files         291      291           
  Lines       19459    19459           
=======================================
  Hits        10565    10565           
  Misses       8214     8214           
  Partials      680      680

[thaJeztah]

rebased

[thaJeztah]

Interesting; e2e fails with: https://jenkins.dockerproject.org/job/docker/job/cli/job/PR-1984/4/console

23:53:17 Cannot connect to the Docker daemon at tcp://172.21.0.2:2375. Is the docker daemon running?
23:53:18 Cannot connect to the Docker daemon at tcp://172.21.0.2:2375. Is the docker daemon running?
23:53:18 Cannot connect to the Docker daemon at tcp://172.21.0.2:2375. Is the docker daemon running?
23:53:19 docker.Makefile:131: recipe for target 'test-e2e-non-experimental' failed
23:53:19 make: *** [test-e2e-non-experimental] Error 124

But the test should be running using the docker socket;

.PHONY: test-e2e-non-experimental
test-e2e-non-experimental: build_e2e_image
	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock $(E2E_IMAGE_NAME)

[kolyshkin]

LGTM (given that CI is green)

[thaJeztah]

all green now