Merge branch 'issue#49' into 'dev-v3.6.1'
issue #49 FEAT03 Add missing minNumberofPreservedInstances attribute to NfviMaintenanceInfo IE See merge request nfv/SOL006!106
issue #49 FEAT03 Add missing minNumberofPreservedInstances attribute to NfviMaintenanceInfo IE See merge request nfv/SOL006!106