Firmware, GPAD_API, Ver 0.58, Krake Plays Audio On "bad format of command!"

[ForrestErickson]

Describe the bug
A clear and concise description of what the bug is.
Short Summary of the expected behavior:
When the Krake payload is bad format the Krake should do nothing.

Short Summary of the buggy behavior:
On the receipt of bad format the LCD contend did not change but the speaker repeated the previous alarm message.

To Reproduce
Steps to reproduce the behavior:

1. Publish to the krake a valid alarm and confirm the LCD displays alarm and you hear the alarm from speaker once.
2. Begin publishing to the Krake a payload with "bad format" For example the measurements of the VentMon
3. The Krake should start repeating alarm on the speaker.

Test Equipment
Used the PMD_PROCESSING_MQTT to send valid alarm message.
Used VentMon with code ???? to publish measurments to the Krake_ALM

Additional context
Add any other context about the problem here.

Here is the Krake serial monitor during receipt of bad payload (published by a VentMon)

Command: {
bad format of command!
PubInv GPAD: enter command in form CDa (C is a char, D is a digit)
currentlyMuted : 1
interpret Done 

[ForrestErickson]

Regression Test #567

Before closing this issue,

Add to Regression Test Plan, a test with "bad format of command"
Send for example the letter 'z' to the Krake.