Allow deletion of all tasks definitions/executions/schedules (spring-…

…cloud#4113)

Fix the inability to destroy all Tasks at once from Shell (using task all destroy).
Applied same logic as for Streams to Task definitions, executions and schedules.

spring-cloud-dataflow-server-core/src/main/resources/META-INF/dataflow-server-defaults.yml

@@ -183,6 +183,7 @@ spring:
 
             - POST   /tasks/definitions              => hasRole('ROLE_CREATE')
             - DELETE /tasks/definitions/*            => hasRole('ROLE_DESTROY')
+            - DELETE /tasks/definitions              => hasRole('ROLE_DESTROY')
             - GET    /tasks/definitions              => hasRole('ROLE_VIEW')
             - GET    /tasks/definitions/*            => hasRole('ROLE_VIEW')
 
@@ -193,6 +194,7 @@ spring:
             - POST   /tasks/executions               => hasRole('ROLE_DEPLOY')
             - POST   /tasks/executions/*             => hasRole('ROLE_DEPLOY')
             - DELETE /tasks/executions/*             => hasRole('ROLE_DESTROY')
+            - DELETE /tasks/executions               => hasRole('ROLE_DESTROY')
 
             # Task Schedules
 
@@ -202,6 +204,7 @@ spring:
             - GET    /tasks/schedules/instances/*    => hasRole('ROLE_VIEW')
             - POST   /tasks/schedules                => hasRole('ROLE_SCHEDULE')
             - DELETE /tasks/schedules/*              => hasRole('ROLE_SCHEDULE')
+            - DELETE /tasks/schedules                => hasRole('ROLE_SCHEDULE')
 
             # Task Platform Account List */