[j-nsp] 100G DAC issue between MX204 and QFX5110

[Chris Wopat]

We have tested flexoptix 3rd party DAC between MX204 and QFX5120/QFX10002
with mixed results. Per release notes/ HCL, DAC isn't supported on MX204
until 18.2

https://apps.juniper.net/hct/product/#prd=MX204

We couldn't link anything with mx204 dac on anything below 18.2. There are
also a few DAC related PRs in the 18.2r1 release notes.

https://www.juniper.net/documentation/en_US/junos/information-products/topic-collections/release-notes/18.2/junos-release-notes-18.2.pdf