apparmor config is incorrect in snap

Description:

The following errors persistently appear in the system log.

audit[1046]: AVC apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/1046/net/netstat" pid=1046 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
audit[1046]: AVC apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/1046/net/snmp" pid=1046 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

Steps to reproduce:

1. Install rocket chat using the snap.
2. Allow the server to run for any length of time.
3. Inspect system log by running command journalctl -f.

Expected behavior:

No errors in system log.

Actual behavior:

Many errors in system log that are continually generated - See description for errors that appear persistently.

Server Setup Information:

• Version of Rocket.Chat Server: 2.4.11
• Operating System: Ubuntu 18.04 LTS (AWS)
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog: ???
• NodeJS Version: Not installed.
• MongoDB Version: ???

Client Setup Information

• Desktop App or Browser Version: N/A
• Operating System: N/A

Additional context

The workaround fix is documented here - please include this in the next snap update
https://github.com/RocketChat/Rocket.Chat/issues/14562#issuecomment-498321790

Relevant logs:

See description.

Start by reviewing the AppArmor denial messages and the workaround documented in issue 14562's linked comment. Inspect the snap's AppArmor configuration and verify the change by running the snap, following journalctl, and confirming that the repeated /proc netstat and snmp denials no longer appear.