Minor CI adjustments

Trusty is default in Travis and no need to encorce Xenial environment.

Correct pipeline name for Drone build, "java8" is no longer applicable.

.drone.yml

@@ -1,5 +1,5 @@
 kind: pipeline
-name: java8
+name: default
 
 clone:
   disable: true

.travis.yml

@@ -4,7 +4,6 @@ branches:
 language: java
 jdk:
   - openjdk11
-dist: trusty
 install: true
 addons:
   sonarcloud: