check_rhv-2.0 released

Changelog:

New features:

• Dropped support for RHEV 3
• Support for RHV 4 and oVirt 4 with REST-APIv4
• new URL: https://github.com/rk-it-at/check_rhv
• support for Gluster volume monitoring (#2)
• support for Gluster brick monitoring (#2)
• check for available updates of RHV hosts

Bugs fixed:

• Removed monitoring of Storagedomain status (#3)
• Unknown interface error check if tmp file is empty (#5)
• Fix network errors (#6)
• Check RHEV Host VMs (-l vms) fails with RHEV UNKNOWN: Host ' ' not found when no vms on host
• VM Pool Check broken in oVirt 4.1
• When using '*' and option '-l usage', output is incomplete
• storagedomain usage calculation broken when specifing multiple storagedomains