repo-install-test: fix ca-certificates-java error

The repo-install-test started to fail on debian 10 with the following
error. Apparently this happens when installing ca-certificates-java
after installing java. Add a workaround.

  Setting up ca-certificates-java (20190405) ...
  head: cannot open '/etc/ssl/certs/java/cacerts' for reading: No such file or directory
  Exception in thread "main" java.lang.InternalError: Error loading java.security file

Change-Id: I00b9c97d9d85fb37ba33a48caa732cd50de99683
---
M scripts/repo-install-test/run-inside.sh
1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/scripts/repo-install-test/run-inside.sh b/scripts/repo-install-test/run-inside.sh
index b45d76d..e08338f 100755
--- a/scripts/repo-install-test/run-inside.sh
+++ b/scripts/repo-install-test/run-inside.sh
@@ -185,8 +185,10 @@
 
 	case "$DISTRO" in
 		debian10)
-			# Can't access https://osmocom.org otherwise
+			# libgnutls30: can't access https://osmocom.org otherwise
+			# ca-certificates-java: fails if installed after java
 			apt-get install -y --no-install-recommends \
+				ca-certificates-java \
 				libgnutls30
 		;;
 	esac

