normalize mac addresses in logging

[ilawjr]

Version:
0.9.13-1

Description:
We should normalize how we log mac addresses (deviceid log field). This will simplify log ingestion and search in elasticsearch.
Depending on how a user requests a mac, we can log mac addresses in at least 3 different ways:

"deviceid":"mac:112233445566"
"deviceid":"mac:11-22-33-44-55-66"
"deviceid":"mac:11:22:33:44:55:66"

We also log according to the case provided by the user:

""deviceid":"mac:11:22:33:44:55:bB"

We should log mac addresses in one unified way. For example, we could remove all delimiters and change to lower case

mac:1122334455bb