Handle audit log paths different from defaults

[rsevilla87]

This commit is intended to make the installer able to handle OpenShift log paths different from (/etc/origin/master, /var/lib/origin, /etc/origin/cloudprovider), which in most of cases are not appropiate since those directories are not usually used as log store.

The code included create new directory (if applies) and adds it as a hostPath in the apiserver static pod definition. The code of the custom module master_check_paths_in_config has been also properly tuned to allow this directories to be defined in the master-config.yaml

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci-robot]

Hi @rsevilla87. Thanks for your PR.

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[vrutkovs]

Hostmounting arbitrary folders is a bad and dangerous idea, what's wrong with using /var/lib/origin?

[rsevilla87]

@vrutkovs In most cases /var/log is an independent mount point and /var/lib/origin has not been sized to store logs.

[vrutkovs]

I'm still not sure if this is a good idea, but in any case master branch would soon be significantly reworked for 4.0 install.

Please open a new PR for release-3.11 branch instead