Admin/components/main

updated to jdk-15.0.2+7;

#main components for everyday use, without big impact on overall build time
bash_process-1.2.3-1
bib2xhtml-20190409
csdp-6.1.1
cvc4-1.8
e-2.5-1
flatlaf-1.0-rc1
isabelle_fonts-20190717
jdk-15.0.2+7
jedit_build-20201223
jfreechart-1.5.1
jortho-1.0-2
kodkodi-1.5.6
nunchaku-0.5
opam-2.0.7
polyml-test-f86ae3dc1686
postgresql-42.2.18
scala-2.13.4
smbc-0.4.1
spass-3.8ds-2
sqlite-jdbc-3.34.0
ssh-java-20190323
stack-2.5.1
vampire-4.2.2
verit-2020.10-rmx-1
xz-java-1.8
z3-4.4.0pre-3
zipperposition-2.0-1