install fails on java/cacerts error

[gerhardqux]

A basic install fails on all environments:

57.29 Setting up ca-certificates-java (20190405) ...
57.36 head: cannot open '/etc/ssl/certs/java/cacerts' for reading: No such file or directory
57.49 Exception in thread "main" java.lang.InternalError: Error loading java.security file
57.49 	at java.base/java.security.Security.initialize(Security.java:94)
57.49 	at java.base/java.security.Security$1.run(Security.java:79)
57.49 	at java.base/java.security.Security$1.run(Security.java:77)
57.49 	at java.base/java.security.AccessController.doPrivileged(Native Method)
57.49 	at java.base/java.security.Security.<clinit>(Security.java:77)
57.49 	at java.base/sun.security.jca.ProviderList.<init>(ProviderList.java:176)
57.50 	at java.base/sun.security.jca.ProviderList$2.run(ProviderList.java:94)
57.50 	at java.base/sun.security.jca.ProviderList$2.run(ProviderList.java:92)
57.50 	at java.base/java.security.AccessController.doPrivileged(Native Method)
57.50 	at java.base/sun.security.jca.ProviderList.fromSecurityProperties(ProviderList.java:91)
57.50 	at java.base/sun.security.jca.Providers.<clinit>(Providers.java:54)
57.50 	at java.base/sun.security.jca.GetInstance.getInstance(GetInstance.java:156)
57.50 	at java.base/java.security.cert.CertificateFactory.getInstance(CertificateFactory.java:193)
57.50 	at org.debian.security.KeyStoreHandler.<init>(KeyStoreHandler.java:50)
57.50 	at org.debian.security.UpdateCertificates.<init>(UpdateCertificates.java:65)
57.50 	at org.debian.security.UpdateCertificates.main(UpdateCertificates.java:51)
57.50 dpkg: error processing package ca-certificates-java (--configure):
57.50  installed ca-certificates-java package post-installation script subprocess returned error exit status 1

Installing ca-certificates-java before anything else, as suggested by https://stackoverflow.com/questions/61305727/head-cannot-open-etc-ssl-certs-java-cacerts-for-reading-no-such-file-or-dir seems to fix this. I'll create a PR...