v1.2.2: exclude offline and placeholder VMs (Katherine Johnson)

Features:

• adds Support to add WWN from Redfish import #121
• adds user to docker file #118
• adds config option to exclude SRM placeholder VMs #136
• adds config option to exclude powered off VM #135

Bugfixes:

• fixes error if nicOrder status is None #117
• log to stdout by default (instead of stderr) #131
• change custom field names to comply to NetBox 3.1.1 constraints #123
• fixes error with IP addresses already existing in NetBox on first sync #120
• fixes issue with special characters in vcenter password #128