[PTest] - Automatic telem / dbtelem

[shihaocao]

Why

We need a system to mimic grabbing data out of a simulated satellite instance that does not have a quake that still uses flows/serializers to generate binary telemetry, and send it to GSW.

What we have right now

Currently USB session has telem, and dbtelem which can be called from the ptest terminal.

What we need to do

• We need to expose those command-line accessible commands to commands that are automatically called from a PTest case
• Need a simple configuration parameter that sets the frequency of downlinks, say 10% to represent the idea that only 10% of our downlinks will be received.

[Duncan-McD]

Pretty sure this is completely done? #665

[Duncan-McD]

Only thing we might want to consider is to not have autotelem spam the cmdclient with the hex? makes it pry difficult to enter any commands