Moderate: NetworkManager security and bug fix update (Oracle Linux 7)

[1:1.18.8-1]
- Update to 1.18.8 relase
- ifcfg-rh: handle '802-1x.{,phase2-}ca-path' (rh #1841397, CVE-2020-10754)
- ifcfg-rh: handle 802-1x.pin properties.

[1:1.18.6-4]
- ip-tunnel: set cloned-mac-address only for layer2 tunnel devices (rh #1832170)

[1:1.18.6-3]
- Update translations (rh #1796852)

[1:1.18.6-2]
- vpn: gracefully handle invalid routes from VPN plugins
- workaround g_strtoll() failing with EAGAIN (rh #1797915)

[1:1.18.6-1]
- Update to 1.18.6 release
- cli: unset 'ipv[46].never-default' when setting 'ipv[46].gateway' (rh #1785039)
- core: keep MTU of MACsec and MAC-VLAN interfaces in sync with parent (rh #1723690)
- core: forbid autoactivation of parent when it is blocked by user request (rh #1765566)