Docs contain links to internal OpsMan API documentation

There are several links within the published documentation on docs.pivotal.io for PCF 2.4 that link to the internal Pivotal OpsMan API docs (via cfapps.io). Examples:

docs-pcf-install/custom-vm-extensions.html.md.erb

Line 55 in c7a2e5f

    
           For more information about this command, see [Deleting a vm extension](https://opsman-dev-api-docs.cfapps.io/#deleting-a-vm-extension) in the Ops Manager API docs.

docs-pcf-install/custom-vm-extensions.html.md.erb

Line 88 in c7a2e5f

    
           For more information about this command, see [Configuring resources for a job](https://opsman-dev-api-docs.cfapps.io/#configuring-resources-for-a-job) in the Ops Manager API docs.

docs-pcf-install/deploy-bosh-om.html.md.erb

Line 96 in 2891c74

    
           For more information, see [Adding a job to the Director](https://opsman-dev-api-docs.cfapps.io/#adding-a-job-to-the-director-vm) in the Ops Manager API documentation.

These should be altered to reference the public OpsMan API docs here.

We have created an issue in Pivotal Tracker to manage this. Unfortunately, the Pivotal Tracker project is private so you may be unable to view the contents of the story.

The labels on this github issue will be updated when the story is started.

@nthomson-pivotal thank you-- you're right, will fix, and extra helpful that you included example line numbers.