#628 AoV: access declared members permission error with JNLP

[David Benn]

See https://www.aavso.org/comment/60302#comment-60302

Also reported by various people on VStar CHOICE course 8 with 2.20.0.

[David Benn]

Some useful links:
https://www.mkyong.com/tomcat/tomcat-javasecurityaccesscontrolexception-access-denied-javalangruntimepermission-accessdeclaredmembers/
https://github.com/elastic/elasticsearch/issues/21992
* https://stackoverflow.com/questions/10674142/java-security-accesscontrolexception-access-denied-java-lang-runtimepermission

[David Benn]

See #701

[David Benn]

Fixed. See also #701