#569)

- remove Jetty (serving JSP pages) for HTTP protocol plugin tests
- replace JSP pages by header/content strings hold in unit test classes

…-plugin-test-remove-jsp

NUTCH-2596 Remove org.mortbay.jetty from unit tests of HTTP protocol plugins

* NUTCH-2857 Upgrade from JDK1.8 --> JDK11

- if URL includes a port the protocol is not normalized
- add unit tests to verify correct behavior

- add note in config file that URLs including port are not left
  unchanged

- host names starting with `*.` are matched as suffixes:
  `*.example.org` matches `example.org`, `www.example.org`,
  `www.subdomain.example.org`, etc.
- allow to read config file protocols.txt from hdfs://
  or any file system supported by Hadoop
- add Javadoc package documentation
- document configuration properties in nutch-default.xml
- reduce memory footprint by deduplicating protocol strings
  so that same protocol values are references to same objects

* NUTCH-2855 Update org.elasticsearch.client

…-protocol-domain-rules

NUTCH-2859: urlnormalizer-protocol: allow to normalize domains

…ring

NUTCH-2866 Fix MetaData.toString() to return "key=value ..."

* NUTCH-2864 Upgrade Dockerfile to use JDK 11