Improve 'nexus' role testability

A change needed by related commit to allow building
a custom nexus url.

Change-Id: Iaa7e1d10d9621871e71863c77722cd635b7e1e4d
Issue-ID: OOM-1915
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
3 files changed