BrooklynMetricsRetriever gets metric to retrieve from the term scope.

Before this commit, the agreement id was also the brooklyn application id.
This made impossible to create two agreements for the same application (one
for the client-app_provider level, one for the app_provider-cloud_provider
level).

Scripts and sample agreements and templates for nuro case study updated.
Removed all non-seaclouds samples.
bin/runserver scripts accepts port listening parameter
Merge branch 'develop' of github.com:SeaCloudsEU/sla-core into develop