Remove jar-dependencies dependency (#509)

* Remove jar-dependencies dependency
* Fix package installer for ubi8-based testing

Author: robbavey

.ci/setup.sh

@@ -3,5 +3,5 @@
 if [ $(command -v apt) ]; then
     sudo apt install -y openssl
 else
-    sudo yum install -y openssl
-fi
+    sudo microdnf install -y openssl
+fi

logstash-input-beats.gemspec

@@ -26,7 +26,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency "concurrent-ruby", "~> 1.0"
   s.add_runtime_dependency "thread_safe", "~> 0.3.5"
   s.add_runtime_dependency "logstash-codec-multiline", ">= 2.0.5"
-  s.add_runtime_dependency 'jar-dependencies', '~> 0.3', '>= 0.3.4'
   s.add_runtime_dependency 'logstash-mixin-ecs_compatibility_support', '~>1.3'
   s.add_runtime_dependency 'logstash-mixin-event_support', '~>1.0'
   s.add_runtime_dependency 'logstash-mixin-plugin_factory_support', '~>1.0'