some jobs now use git proto to fetch Zuul reference

Change the use-remote-zuul default to point to a git:// URL instead of
http:// url to fetch the Zuul reference.

Updated jobs are mostly python ones:

analytics-asana-stats-pep8
analytics-asana-stats-pyflakes
analytics-check-stats-pep8
analytics-check-stats-pyflakes
analytics-editor-geocoding-pep8
analytics-editor-geocoding-pyflakes
analytics-gerrit-stats-pep8
analytics-gerrit-stats-pyflakes
analytics-glass-pep8
analytics-glass-pyflakes
analytics-reportcard-pep8
analytics-reportcard-pyflakes
integration-jenkins-pep8
integration-jenkins-pyflakes
integration-zuul-layoutdiff
integration-zuul-layoutvalidation
labs-nagios-builder-pep8
labs-nagios-builder-pyflakes
mw-tools-codeutils-pep8
mw-tools-codeutils-pyflakes
mw-tools-codeutils-sphinx-doc
mw-tools-fluoride-pep8
mw-tools-fluoride-pyflakes
mw-tools-fluoride-sphinx-doc
mw-tools-release-pep8
mw-tools-release-pyflakes
mw-tools-release-sphinx-doc
mwext-BlameMaps-pep8
mwext-BlameMaps-pyflakes
mwext-BlameMaps-sphinx-doc
mwext-ConfirmEdit-pep8
mwext-ConfirmEdit-pyflakes
mwext-ConfirmEdit-sphinx-doc
mwext-DumpHTML-pep8
mwext-DumpHTML-pyflakes
mwext-DumpHTML-sphinx-doc
mwext-EventLogging-pep8
mwext-EventLogging-pyflakes
mwext-EventLogging-sphinx-doc
mwext-Offline-pep8
mwext-Offline-pyflakes
mwext-Offline-sphinx-doc
mwext-OpenStackManager-pep8
mwext-OpenStackManager-pyflakes
mwext-OpenStackManager-sphinx-doc
mwext-SemanticBundle-pep8
mwext-SemanticBundle-pyflakes
mwext-SemanticBundle-sphinx-doc
mwext-SemanticResultFormats-pep8
mwext-SemanticResultFormats-pyflakes
mwext-SemanticResultFormats-sphinx-doc
mwext-WikimediaMaintenance-pep8
mwext-WikimediaMaintenance-pyflakes
mwext-WikimediaMaintenance-sphinx-doc
operations-debs-adminbot-pep8
operations-debs-adminbot-pyflakes
operations-debs-adminbot-sphinx-doc
operations-debs-ircecho-pep8
operations-debs-ircecho-pyflakes
operations-debs-ircecho-sphinx-doc
operations-dumps-pep8
operations-dumps-pyflakes
operations-dumps-sphinx-doc
operations-software-pep8
operations-software-pyflakes
operations-software-redactatron-pep8
operations-software-redactatron-pyflakes
operations-software-redactatron-sphinx-doc
operations-software-sphinx-doc
pywikibot-compat-pep8
pywikibot-compat-pyflakes
pywikibot-compat-sphinx-doc
pywikibot-core-pep8
pywikibot-core-pyflakes
pywikibot-core-sphinx-doc
pywikibot-i18n-pep8
pywikibot-i18n-pyflakes
pywikibot-i18n-sphinx-doc
sartoris-pep8
sartoris-pyflakes
sartoris-sphinx-doc
translatewiki-puppet-validate
translatewiki-shelllint
wikimedia-fundraising-tools-pep8
wikimedia-fundraising-tools-pyflakes
wikimedia-fundraising-tools-sphinx-doc

Change-Id: Ia272be63a21cd613d37374b65f499e6543555dd1