Fixed a bug with assertDictAlmostEquals
Fixed a bug with assertDictAlmostEquals

the function now recurses through nested dicts


Former-commit-id: f8f5c624a9dd695d458d41f7168ebb297476e5ec
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine