Add cleaup nve interface for ip_multicast test

[mikewiebe]

This test only runs on n9k. The failure in the beaker test indicated that the nve interface needed to be in the shutdown state before the multicast overlay_distributed_dr property in question could be set.

This test does not validate nve but it should cleanup any nve interfaces as part of the setup step. Currently only one nve interface can be configured.

Tested on N9k (GS and agentless)

[codecov-io]

Codecov Report

Merging #575 into develop will increase coverage by 0.08%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           develop    #575      +/-   ##
==========================================
+ Coverage     5.77%   5.85%   +0.08%     
==========================================
  Files          177     177              
  Lines        20856   20876      +20     
==========================================
+ Hits          1204    1223      +19     
- Misses       19652   19653       +1

Impacted Files	Coverage Δ
lib/puppet_x/cisco/cmnutils.rb	23.03% <0%> (-0.15%)	:arrow_down:
lib/puppet/provider/domain_name/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/snmp_community/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/tacacs_server/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/radius/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/syslog_facility/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
...puppet/provider/tacacs_server_group/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/search_domain/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/ntp_auth_key/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
lib/puppet/provider/ntp_server/cisco_nexus.rb	100% <0%> (ø)	:arrow_up:
... and 3 more

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