ci: Also bump MSRV to 1.37.0 for CCI Jenkins

Just split it out into a separate script for easier sharing.

.cci.jenkinsfile

@@ -40,17 +40,9 @@ msrv: {
   coreos.pod(image: 'registry.svc.ci.openshift.org/coreos/cosa-buildroot:latest', runAsUser: 0) {
       checkout scm
 
-      // this corresponds to the latest Rust module available in el8
-      def MINIMUM_SUPPORTED_RUST_VERSION = "1.31.0"
-
       sh """
         set -euo pipefail
-        ci/installdeps.sh
-        curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain ${MINIMUM_SUPPORTED_RUST_VERSION} -y
-        PATH="\$HOME/.cargo/bin:\$PATH" ci/build.sh |& tee out.txt
-        grep ${MINIMUM_SUPPORTED_RUST_VERSION} out.txt
-        grep "checking for cargo... \$HOME/.cargo/bin/cargo" out.txt
-        grep "checking for rustc... \$HOME/.cargo/bin/rustc" out.txt
+        ci/msrv.sh
       """
   }
 }}

.papr.yml

@@ -132,15 +132,5 @@ required: true
 container:
   image: registry.fedoraproject.org/fedora:29
 
-env:
-  # this corresponds to the latest Rust module available in el8
-  RUST_MIN_VERSION: 1.37.0
-
 tests:
-  - ci/installdeps.sh
-  - yum remove -y cargo
-  - curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain $RUST_MIN_VERSION -y
-  - PATH=$HOME/.cargo/bin:$PATH ci/build.sh |& tee out.txt
-  - grep $RUST_MIN_VERSION out.txt
-  - grep "checking for cargo... $HOME/.cargo/bin/cargo" out.txt
-  - grep "checking for rustc... $HOME/.cargo/bin/rustc" out.txt
+  - ci/msrv.sh

ci/msrv.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -euo pipefail
+
+# this corresponds to the latest Rust module available in el8
+MINIMUM_SUPPORTED_RUST_VERSION=1.37.0
+
+ci/installdeps.sh
+dnf remove -y cargo
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain ${MINIMUM_SUPPORTED_RUST_VERSION} -y
+PATH="$HOME/.cargo/bin:$PATH" ci/build.sh |& tee out.txt
+grep ${MINIMUM_SUPPORTED_RUST_VERSION} out.txt
+grep "checking for cargo... $HOME/.cargo/bin/cargo" out.txt
+grep "checking for rustc... $HOME/.cargo/bin/rustc" out.txt