Fixed medbay maintenance wierdness

Before:
![screenshot 2014-05-01 19 37 28](https://cloud.githubusercontent.com/assets/242428/2858713/e9ad4016-d18d-11e3-86af-9c93dbf69800.png)

After:
![screenshot 2014-05-01 19 42 08](https://cloud.githubusercontent.com/assets/242428/2858718/f7eb44c0-d18d-11e3-97ac-4b91e74688f0.png)

Maintenance door renamed from "surgery maintenance" to "Firefighting equipment" and given access code 12 to match similar doors.