Replace all patch cables with gigabit ones

[mitar]

We should make sure all patches cables support gigabit and that all switches are between each other connected with gigabit connections.

[mitar]

Will probably improve: https://github.com/cloyne/network/issues/69

[mitar]

We bought the following patch cables:

• 80 x 2ft black (switch to room, top row)
• 80 x 2ft white (switch to room, bottom row)
• 10 x 5th grey (servers)
• 10 x 5ft yellow (uplink in the server room)
• 10 x 2ft yellow (uplink in the switches)
• 15 x 2ft green (APs)
• 10 x 2ft blue (mesh antennas)

In parenthesis you see the purpose of colors.

[mitar]

Done with #92. The rest to be done in #92.