Lock down plugin versions to last viable Y release

[noissue]

images/pulp/stable/Containerfile.core

@@ -1,13 +1,13 @@
 FROM quay.io/pulp/base:3.21
 
 RUN pip install pulpcore~=3.21.0 \
-  pulp_ansible \
-  pulp-certguard \
-  pulp_container \
-  pulp_deb \
-  pulp_file \
-  pulp_python \
-  pulp_rpm
+  pulp_ansible~=0.16.0 \
+  pulp-certguard~=1.6.0 \
+  pulp_container~=2.14.0 \
+  pulp_deb~=2.20.0 \
+  pulp_file~=1.11.0 \
+  pulp_python~=3.7.0 \
+  pulp_rpm~=3.19.0
 
 USER pulp:pulp
 RUN PULP_STATIC_ROOT=/var/lib/operator/static/ PULP_CONTENT_ORIGIN=localhost \

s6_images/pulp/Containerfile

@@ -2,14 +2,15 @@ ARG FROM_TAG="latest"
 FROM pulp/pulp-ci-centos:${FROM_TAG}
 
 ARG PULPCORE_VERSION="~=3.21.0"
-ARG PULP_ANSIBLE_VERSION=""
-ARG PULP_CERTGUARD_VERSION=""
-ARG PULP_CONTAINER_VERSION=""
-ARG PULP_DEB_VERSION=""
-ARG PULP_FILE_VERSION=""
-ARG PULP_MAVEN_VERSION=""
-ARG PULP_PYTHON_VERSION=""
-ARG PULP_RPM_VERSION=""
+# These are the final Y versions that support pulpcore 3.21
+ARG PULP_ANSIBLE_VERSION="~=0.16.0"
+ARG PULP_CERTGUARD_VERSION="~=1.6.0"
+ARG PULP_CONTAINER_VERSION="~=2.14.0"
+ARG PULP_DEB_VERSION="~=2.20.0"
+ARG PULP_FILE_VERSION="~=1.11.0"
+ARG PULP_MAVEN_VERSION="~=0.3.0"
+ARG PULP_PYTHON_VERSION="~=3.7.0"
+ARG PULP_RPM_VERSION="~=3.19.0"
 
 RUN pip3 install --upgrade \
   pulpcore${PULPCORE_VERSION} \

s6_images/pulp_galaxy_ng/Containerfile

@@ -1,7 +1,7 @@
 ARG FROM_TAG="latest"
 FROM pulp/pulp-ci-centos:${FROM_TAG}
 
-ARG GALAXY_NG_VERSION=""
+ARG GALAXY_NG_VERSION="~=4.6.0"
 
 RUN pip3 install --upgrade \
   requests \