Changed package name and imports from the pm628 model, deleted tests directory

...in/java/org/openapitools/OpenApiGeneratorApplication.java

...628/src/main/java/org/openapitools/RFC3339DateFormat.java

...tmf/pm628/src/main/java/org/openapitools/api/ApiUtil.java

...main/java/org/openapitools/api/DataAccessEndpointApi.java

...org/openapitools/api/DataAccessEndpointApiController.java

.../tmf/pm628/src/main/java/org/openapitools/api/HubApi.java

.../src/main/java/org/openapitools/api/HubApiController.java

...pm628/src/main/java/org/openapitools/api/ListenerApi.java

...main/java/org/openapitools/api/ListenerApiController.java

...ava/org/openapitools/api/MeasurementCollectionJobApi.java

...enapitools/api/MeasurementCollectionJobApiController.java

...itools/api/PerformanceIndicatorGroupSpecificationApi.java

.../PerformanceIndicatorGroupSpecificationApiController.java

...penapitools/api/PerformanceIndicatorSpecificationApi.java

...s/api/PerformanceIndicatorSpecificationApiController.java

.../java/org/openapitools/api/PerformanceMeasurementApi.java

...openapitools/api/PerformanceMeasurementApiController.java

...src/main/java/org/openapitools/api/TrackingRecordApi.java

...ava/org/openapitools/api/TrackingRecordApiController.java

...penapitools/configuration/EnumConverterConfiguration.java