test: Don't support regexp in DeepEqual
test: Don't support regexp in DeepEqual

Drop test comparisons of *regexp.RegExp. This causes us trouble in the
go master branch due to changes in the struct. Don't claim to support
it.

Change-Id: If247d269c5886b62ba39c6e74eb68cc1f28423c3

aristanetworks/goarista,aristanetworks/goarista