extend nmcli autoconnect-retries and autoconnect-slaves to replace default value

[bybai]

The PR is to fix issue

#6228

The modification include

When activate NICs on some servers, nmcli con up <con_name> is timeout, so I add extend nmcli autoconnect-retries and autoconnect-slaves to replace default value, the connect can retry activate itself and its slaves.

autoconnect-retries	int32	-1	The number of times a connection should be tried when autoactivating before giving up. Zero means forever, -1 means the global default (4 times if not overridden). Setting this to 1 means to try activation only once before blocking autoconnect. Note that after a timeout, NetworkManager will try to autoconnect again.
autoconnect-slaves	NMSettingConnectionAutoconnectSlaves (int32)		Whether or not slaves of this connection should be automatically brought up when NetworkManager activates this connection. This only has a real effect for master connections. The properties "autoconnect", "autoconnect-priority" and "autoconnect-retries" are unrelated to this setting. The permitted values are: 0: leave slave connections untouched, 1: activate all the slave connections with this connection, -1: default. If -1 (default) is set, global connection.autoconnect-slaves is read to determine the real value. If it is default as well, this fallbacks to 0.

The UT result

The following auto test cases are passed:

]# grep END /opt/xcat/bin/../share/xcat/tools/autotest/result//performance.report.20190507233039
END::confignetwork_2eth_bridge_br0::Passed::Time:Tue May  7 23:32:00 2019 ::Duration::77 sec
END::confignetwork_2eth_bridge_br22_br33::Passed::Time:Tue May  7 23:34:07 2019 ::Duration::127 sec
END::confignetwork__bridge_false::Passed::Time:Tue May  7 23:34:33 2019 ::Duration::26 sec
END::confignetwork_bond_eth2_eth3::Passed::Time:Tue May  7 23:35:20 2019 ::Duration::47 sec
END::confignetwork_bond_false::Passed::Time:Tue May  7 23:35:54 2019 ::Duration::34 sec
END::confignetwork_disable_set_to_1::Passed::Time:Tue May  7 23:36:02 2019 ::Duration::8 sec
END::confignetwork_disable_set_to_yes::Passed::Time:Tue May  7 23:36:10 2019 ::Duration::8 sec
END::confignetwork_installnic_2eth_bridge_br22_br33::Passed::Time:Tue May  7 23:38:17 2019 ::Duration::127 sec
END::confignetwork_niccustomscripts::Passed::Time:Tue May  7 23:38:25 2019 ::Duration::8 sec
END::confignetwork_s_installnic_secondarynic_updatenode::Passed::Time:Tue May  7 23:38:47 2019 ::Duration::22 sec
END::confignetwork_secondarynic_nicaliases_updatenode::Passed::Time:Tue May  7 23:39:04 2019 ::Duration::17 sec
END::confignetwork_secondarynic_nicextraparams_updatenode::Passed::Time:Tue May  7 23:39:25 2019 ::Duration::21 sec
END::confignetwork_secondarynic_nicips_updatenode_false::Passed::Time:Tue May  7 23:39:32 2019 ::Duration::7 sec
END::confignetwork_secondarynic_nicnetworks_updatenode_false::Passed::Time:Tue May  7 23:39:38 2019 ::Duration::6 sec
END::confignetwork_secondarynic_nictype_updatenode_false::Passed::Time:Tue May  7 23:39:45 2019 ::Duration::7 sec
END::confignetwork_secondarynic_thirdnic_multiplevalue_updatenode::Passed::Time:Tue May  7 23:40:09 2019 ::Duration::24 sec
END::confignetwork_secondarynic_updatenode::Passed::Time:Tue May  7 23:40:23 2019 ::Duration::14 sec
END::confignetwork_vlan_bond::Passed::Time:Tue May  7 23:41:05 2019 ::Duration::42 sec
END::confignetwork_vlan_eth0::Passed::Time:Tue May  7 23:41:35 2019 ::Duration::30 sec
END::confignetwork_vlan_false::Passed::Time:Tue May  7 23:41:57 2019 ::Duration::22 sec

[zet809]

Good to me, I agree to merge. thx @bybai