tests/site:
tests/site:

Added another test case for SiteCollection.__iter__() to explicitly
show that Sites produced from a SiteCollection will have a 0.0 for
their depth.

gem/oq-engine,mmpagani/oq-hazardlib,ROB-Seismology/oq-hazardlib,g-weatherill/oq-hazardlib,g-weatherill/oq-hazardlib,gem/oq-engine,vup1120/oq-hazardlib,gem/oq-hazardlib,ROB-Seismology/oq-hazardlib,silviacanessa/oq-hazardlib,silviacanessa/oq-hazardlib,rcgee/oq-hazardlib,mmpagani/oq-hazardlib,rcgee/oq-hazardlib,larsbutler/oq-hazardlib,gem/oq-engine,silviacanessa/oq-hazardlib,gem/oq-engine,vup1120/oq-hazardlib,ROB-Seismology/oq-hazardlib,larsbutler/oq-hazardlib,vup1120/oq-hazardlib,g-weatherill/oq-hazardlib,mmpagani/oq-hazardlib,larsbutler/oq-hazardlib,ROB-Seismology/oq-hazardlib,gem/oq-hazardlib,gem/oq-hazardlib,gem/oq-engine,silviacanessa/oq-hazardlib,g-weatherill/oq-hazardlib