Set GOVUK_CONTENT_SCHEMAS_PATH for publishing-api on dev vm
Set GOVUK_CONTENT_SCHEMAS_PATH for publishing-api on dev vm

On deployed environments this env var is set to the value in common.yaml:

    /data/apps/govuk-content-schemas/current

However this path does not exist on the dev VM so in development.yaml we set it
to the path that does exist (or should if you've checked out the repo):

    /var/govuk/govuk-content-schemas

Without a correct path for the schemas various endpoints in the publishing-api
will fail.

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