Improve #md_link method implementation for objects

[orenyk]

At the moment, links generated by the #md_link method for use in Reservation notes are using an incorrect hostname, vmBLAH.BLAH.yale.edu, instead of development.reservations.yale.edu. We've either left out a configuration parameter so that the URL helpers are pulling the wrong hostname or something else weird is going on. This should be fixed ASAP.

Update (2015-12-18)

This turned out to be a configuration error - I'm re-purposing this issue for re-factoring the md_link method slightly:

• Take the link text as a parameter (defaulting to the current defaults) so that it can be used with arbitrary link text
• Update the EquipmentItem#make_reservation_notes method to use Reservation#md_link method with the relevant verb as the link text parameter
• Tests!

[orenyk]

Ok, this is our bad - we should be using RESOURCE_path, not RESOURCE_url in the #md_link methods. I'll update them accordingly. Actually, as a separate refactoring, let's modify #md_link to take an optional link_text parameter that defaults to whatever we're currently using but which can then be used in the #make_reservation_notes method to pass in the relevant verb.

[orenyk]

On second though, I realized that we were using RESOURCE_path so that if they clicked on links in the notes e-mails they would work. I guess we're missing a configuration parameter for the e-mail links? I'm going to double check in Jenkins...

[orenyk]

Ok, it's already configured, they just mis-configured it in Jenkins. I'll open a ticket with ITS to update the settings.

[orenyk]

Updated our ongoing task in ServiceNow; I'm going to repurpose this issue for refactoring the md_link methods to include the link text as a parameter and to use that everywhere.