Install ca-certificates before Osmocom repo

Prepare for using https://downloads.osmocom.org/packages/ instead of
http://download.opensuse.org to download packages. Install
ca-certificates before attempting to use the repository, otherwise it
will print a warning and not use the repository and e.g. install
eclipse-titan from debian's repository instead of our repo.

Fix for:
W: https://downloads.osmocom.org/packages/osmocom:/latest/Debian_11/./InRelease: No system certificates available. Try installing ca-certificates.

Related: OS#5557
Change-Id: Icb6764601671b6e66591f33ede6d0f822811545a

debian-bullseye-build/Dockerfile

@@ -15,6 +15,7 @@ RUN	apt-get update && \
 		automake \
 		bison \
 		build-essential \
+		ca-certificates \
 		cppcheck \
 		dahdi-source \
 		debhelper \

debian-bullseye-erlang/Dockerfile

@@ -44,6 +44,7 @@ RUN	apt-get update && \
 
 # add osmocom latest repo, should we ever require packages from there
 RUN	apt-get update && apt-get install -y \
+		ca-certificates \
 		gnupg
 COPY	.common/Release.key /tmp/Release.key
 RUN	apt-key add /tmp/Release.key && \

debian-bullseye-obs-latest/Dockerfile

@@ -10,6 +10,7 @@ RUN	apt-get update && \
 	apt-get upgrade -y && \
 	apt-get install -y --no-install-recommends \
 		telnet \
+		ca-certificates \
 		gnupg \
 		&& \
 	apt-get clean

debian-bullseye-titan/Dockerfile

@@ -8,6 +8,7 @@ ARG	OSMOCOM_REPO_TESTSUITE_MIRROR="http://download.opensuse.org"
 ARG	OSMOCOM_REPO="$OSMOCOM_REPO_TESTSUITE_MIRROR/repositories/network:/osmocom:/latest/Debian_11/"
 
 RUN	apt-get update && apt-get install -y \
+		ca-certificates \
 		gnupg
 
 COPY	.common/Release.key /tmp/Release.key

debian-buster-build/Dockerfile

@@ -15,6 +15,7 @@ RUN	apt-get update && \
 		automake \
 		bison \
 		build-essential \
+		ca-certificates \
 		cppcheck \
 		dahdi-source \
 		debhelper \

debian-buster-jenkins/Dockerfile

@@ -26,6 +26,7 @@ RUN \
 		bc \
 		bison \
 		bzip2 \
+		ca-certificates \
 		cmake \
 		coccinelle \
 		cppcheck \

debian-jessie-osmocom/Dockerfile

@@ -9,6 +9,9 @@ ARG	OSMOCOM_REPO="${OSMOCOM_REPO_MIRROR}/${OSMOCOM_REPO_PATH}/nightly/Debian_8.0
 
 COPY	.common/Release.key /tmp/Release.key
 
+RUN	apt-get update && apt-get install -y \
+		ca-certificates
+
 RUN	apt-key add /tmp/Release.key && \
 	rm /tmp/Release.key && \
 	echo "deb " $OSMOCOM_REPO " ./" > /etc/apt/sources.list.d/osmocom-nightly.list

debian-sid-jenkins/Dockerfile

@@ -26,6 +26,7 @@ RUN \
 		bc \
 		bison \
 		bzip2 \
+		ca-certificates \
 		cmake \
 		coccinelle \
 		cppcheck \

debian-stretch-build/Dockerfile

@@ -15,6 +15,7 @@ RUN	apt-get update && \
 		automake \
 		bison \
 		build-essential \
+		ca-certificates \
 		cppcheck \
 		dahdi-source \
 		debhelper \

debian-stretch-jenkins/Dockerfile

@@ -26,6 +26,7 @@ RUN \
 		bc \
 		bison \
 		bzip2 \
+		ca-certificates \
 		cmake \
 		coccinelle \
 		cppcheck \

debian-stretch-obs-latest/Dockerfile

@@ -9,6 +9,7 @@ ARG	OSMOCOM_REPO="${OSMOCOM_REPO_MIRROR}/${OSMOCOM_REPO_PATH}/latest/Debian_9.0/
 RUN	apt-get update && \
 	apt-get upgrade -y && \
 	apt-get install -y --no-install-recommends \
+		ca-certificates \
 		telnet \
 		gnupg \
 		&& \

osmo-ran/Dockerfile

@@ -16,6 +16,7 @@ RUN	case "$DISTRO" in \
 	debian*) \
 		apt-get update && \
 		apt-get install -y --no-install-recommends \
+			ca-certificates \
 			gnupg && \
 		apt-key add /tmp/Release.key && \
 		rm /tmp/Release.key && \

osmo-ran/split/ran-bsc_mgw/Dockerfile

@@ -16,6 +16,7 @@ RUN	case "$DISTRO" in \
 	debian*) \
 		apt-get update && \
 		apt-get install -y --no-install-recommends \
+			ca-certificates \
 			gnupg && \
 		apt-key add /tmp/Release.key && \
 		rm /tmp/Release.key && \

osmo-ran/split/ran-bts_pcu/Dockerfile

@@ -16,6 +16,7 @@ RUN	case "$DISTRO" in \
 	debian*) \
 		apt-get update && \
 		apt-get install -y --no-install-recommends \
+			ca-certificates \
 			gnupg && \
 		apt-key add /tmp/Release.key && \
 		rm /tmp/Release.key && \

osmo-ran/split/ran-trx-ipc/Dockerfile

@@ -16,6 +16,7 @@ RUN	case "$DISTRO" in \
 	debian*) \
 		apt-get update && \
 		apt-get install -y --no-install-recommends \
+			ca-certificates \
 			gnupg && \
 		apt-key add /tmp/Release.key && \
 		rm /tmp/Release.key && \

osmo-ran/split/ran-trx-uhd/Dockerfile

@@ -16,6 +16,7 @@ RUN	case "$DISTRO" in \
 	debian*) \
 		apt-get update && \
 		apt-get install -y --no-install-recommends \
+			ca-certificates \
 			gnupg && \
 		apt-key add /tmp/Release.key && \
 		rm /tmp/Release.key && \