OPENDAP/olfs: OLFS 1.18.9 for Hyrax 1.16.4

Requires:

• libdap-3.20.8
• bes-3.20.9

• Fixed gradle dependancies according snyk scan.
• Session serialization
• Added session manager jars to ngap resources.
• Updated production rules to include session manager code in the ngap application build.
• Made history_json output as JSONArray.
• New landing page for NGAP service.
• Added UNIX time to OLFS logs in NGAP.

• Fixed bug in computation of dimension sizes in the dap4 ifh xsl.
• Dropped DSR response for just the dataset_url.
• Fixed broken json error output.
• Changed the broken naming pattern for the PPT strings.
• Enabled ChunkedInputStream debugging and cleaned up the messages in support of stream pollution problem.
• Fixed broken css and deployment context links construction in DSR HTML page.

• Added file size and last modified headers to flat file transfer.
• Added auth.log independent of debug log.
• First pass at patching POST request handling.