moved hazard to own package; simplified request-response

...main/java/gov/usgs/earthquake/nshmp/www/ServicesUtil.java

src/main/java/gov/usgs/earthquake/nshmp/www/ServletUtil.java

...java/gov/usgs/earthquake/nshmp/www/SwaggerController.java

...ov/usgs/earthquake/nshmp/www/hazard/HazardController.java

...a/gov/usgs/earthquake/nshmp/www/hazard/HazardService.java

...va/gov/usgs/earthquake/nshmp/www/hazard/MaxDirection.java

...ain/java/gov/usgs/earthquake/nshmp/www/meta/Metadata.java

...ov/usgs/earthquake/nshmp/www/services/HazardService2.java

...a/gov/usgs/earthquake/nshmp/www/services/RateService.java

...arthquake/nshmp/www/services/SourceLogicTreesService.java

...ov/usgs/earthquake/nshmp/www/services/SourceServices.java