Fixed some URIs of the calculate tab

The hazard/risk unification in https://github.com/gem/oq-engine/pull/1594 involves the following URI changes:

/v1/calc/(hazard|risk)/<id> -> /v1/calc/<id>
/v1/calc/(hazard|risk)/<id>/results -> /v1/calc/<id>/results
/v1/calc/(hazard|risk)/result/<id> -> /v1/calc/result/<id>
/v1/calc/(hazard|risk)/run -> /v1/calc/run