Keep setup output out of test.log

It looks like the command that gets run covers more than the test script.
We need to keep that other output out of the output we search for
failure. The includes the dnf step, since it can have non fatal failures.
It also looks like the dnf step might need kernel-modules-extra for
mounting squashfs file systems.

tests/Squashfs-compression-test.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 
 # We need rpmdev-vercmp
-dnf install -y --nogpgcheck rpmdevtools
 rpm -q rpmdevtools > /dev/null 2>&1 || (echo 'rpmdev-vercmp from rpmdevtools is needed to run this script, aborting (failed).'; exit 1)
 
 # Define block sizes

tests/test_working.yml

@@ -12,7 +12,7 @@
     block:
       - name: Execute the tests
         shell: |
-          /usr/local/bin/Squashfs-compression-test.sh &> /tmp/test.log; grep -iq failed /tmp/test.log && result=fail || result=pass
+          dnf install -y --nogpgcheck kernel-modules-extra rpmdevtools; (/usr/local/bin/Squashfs-compression-test.sh &> /tmp/test.log); grep -iq failed /tmp/test.log && result=fail || result=pass
           echo -e "results:\n- {result: $result, test: working}" > /tmp/results.yml
     always:
       - name: Pull out the logs