Error registering plugin Logstash5.5.0 Debian9

Moved from [ES output failing with long message Logstash 5.5.0 Debian9 #631](https://github.com/logstash-plugins/logstash-output-elasticsearch/issues/631)

- Version: Logstash5.5.0 Elasticsearch5.5.0
- Operating System:Debian9
- Config File:
```
input {
beats {
port => "5043"
}
}
filter {
grok {
match => { "message" => "%{COMBINEDAPACHELOG}"}
}
geoip {
source => "clientip"
}
}
output {
elasticsearch {
hosts => [ "localhost:9200" ]
}
}
```

- Steps to Reproduce:
```
10:42:45.788 [Ruby-0-Thread-3: /usr/share/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.22/lib/stud/task.rb:22] WARN logstash.agent - fetched new config for pipeline. upgrading.. {:pipeline=>"main", :config=>"input {\n\t\tbeats {\n\t\t\t\tport => \"5043\"\n\t\t}\n}\n# The filter part of this file is commented out to indicate that it is\n# optional.\nfilter {\n\t\tgrok {\n\t\t\t\tmatch => { \"message\" => \"%{COMBINEDAPACHELOG}\"}\n\t\t}\n\t\tgeoip {\n\t\t\t\tsource => \"clientip\"\n\t\t}\n}\noutput {\n\t\telasticsearch {\n\t\t\t\thosts => [\"http://192.168.220.123:9200\"]\n\t\t}\n}\n\n"}
10:42:45.789 [Ruby-0-Thread-3: /usr/share/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.22/lib/stud/task.rb:22] WARN logstash.agent - stopping pipeline {:id=>"main"}
10:42:50.829 [Ruby-0-Thread-36: /usr/share/logstash/logstash-core/lib/logstash/shutdown_watcher.rb:31] WARN logstash.shutdownwatcher - {"inflight_count"=>0, "stalling_thread_info"=>{"other"=>[{"thread_id"=>90, "name"=>"[main]"[...]/vendor/bundle/jruby/1.9/gems/logstash-input-beats-3.1.21-java/lib/logstash/inputs/beats.rb:206:in `run'"}], ["LogStash::Filters::GeoIP", {"source"=>"clientip", "id"=>"ab1892fc61a4dfa666c5a9ed87ba5d230a195067-3"}]=>[{"thread_id"=>80, "name"=>"[main]>worker0", "current_call"=>"[...]/logstash-core/lib/logstash/util/wrapped_synchronous_queue.rb:147:in `lock'"}, {"thread_id"=>81, "name"=>"[main]>worker1", "current_call"=>"[...]/logstash-core/lib/logstash/util/wrapped_synchronous_queue.rb:147:in `lock'"}]}}
10:42:50.832 [Ruby-0-Thread-36: /usr/share/logstash/logstash-core/lib/logstash/shutdown_watcher.rb:31] ERROR logstash.shutdownwatcher - The shutdown process appears to be stalled due to busy or blocked plugins. Check the logs for more information.
10:42:52.655 [[main]-pipeline-manager] ERROR logstash.pipeline - Error registering plugin {:plugin=>"#, @structured_lookup_mutex=#, @fast_lookup=#>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs, :\"aa8f4e22cd0da4e8237f9364d12406477de7a398-4\"]>, @metric=#, @structured_lookup_mutex=#, @fast_lookup=#>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs]>, @logger=#>, @strategy=#[http://192.168.220.123:9200], id=>\"aa8f4e22cd0da4e8237f9364d12406477de7a398-4\", enable_metric=>true, codec=>\"plain_57d55755-2ae9-4f65-90aa-9a7d47e6e60f\", enable_metric=>true, charset=>\"UTF-8\">, workers=>1, index=>\"logstash-%{+YYYY.MM.dd}\", manage_template=>true, template_name=>\"logstash\", template_overwrite=>false, idle_flush_time=>1, doc_as_upsert=>false, script_type=>\"inline\", script_lang=>\"painless\", script_var_name=>\"event\", scripted_upsert=>false, retry_initial_interval=>2, retry_max_interval=>64, retry_on_conflict=>1, action=>\"index\", ssl_certificate_verification=>true, sniffing=>false, sniffing_delay=>5, timeout=>60, pool_max=>1000, pool_max_per_route=>100, resurrect_delay=>5, validate_after_inactivity=>10000, http_compression=>false>>, @id=\"aa8f4e22cd0da4e8237f9364d12406477de7a398-4\", @metric_events=#, @structured_lookup_mutex=#, @fast_lookup=#>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs, :\"aa8f4e22cd0da4e8237f9364d12406477de7a398-4\", :events]>, @output_class=LogStash::Outputs::ElasticSearch>", :error=>"SSLConnectionSocketFactory not found in packages org.apache.http.client.methods, org.apache.http.client.entity, org.apache.http.client.config, org.apache.http.config, org.apache.http.conn.socket, org.apache.http.impl, org.apache.http.impl.client, org.apache.http.impl.conn, org.apache.http.impl.auth, org.apache.http.entity, org.apache.http.message, org.apache.http.params, org.apache.http.protocol, org.apache.http.auth, java.util.concurrent, org.apache.http.client.protocol, org.apache.http.conn.ssl, java.security.cert, java.security.spec, java.security, org.apache.http.client.utils; last error: cannot load Java class org.apache.http.client.utils.SSLConnectionSocketFactory"}
```
I can use it in Ubuntu 16.04.3
The error will stop the pipeline,Please help, Thanks