* SNMP counters validation
Validation step added before counters are updated in table 'bill_port_counters'.
Avoid wrong data to be added to the table in case the SNMP polling function return an invalid value.
check --> https://community.librenms.org/t/wrong-billing-record-in-delta/8540
* SNMP counters validation #11037
--> Fixed lin identation.
*Updated message to be printed out in logs.
* SNMP counters validation #11037
Fixed blank spaces.
* SNMP counters validation #11037
Removing white spaces
* SNMP counters validation #11037
Sorry, more white spaces...
