Implement user journey tests

Cover the basic user journey use cases:

• landing page maps to all links, excluding
  • NFV portal
  • Who we are / 2nd link - OpenSlice by ETSI
• landing page/login/redirect for all portals (except NFV)
• services portal logged-in user journey (Service Marketplace + Manage Services - all list)
• product portal logged-in user journey (Marketplace + Manage Products - all list)
• resources portal logged-in user journey (Manage Resources - all list)
• testing logged-in user journey (Manage Tests - all list)