Add test for passing custom option on kernel command line

Related: rhbz#1687743

tests/cli/lib/lib.sh

@@ -8,6 +8,7 @@ verify_image() {
     SSH_OPTS="-o StrictHostKeyChecking=no $3"
     rlLogInfo "verify_image: SSH_OPTS:'$SSH_OPTS' SSH_USER:'$SSH_USER' SSH_MACHINE: '$SSH_MACHINE'"
     check_root_account "$@"
+    check_kernel_cmdline "$@"
 }
 
 check_root_account() {
@@ -42,3 +43,8 @@ check_root_account() {
     rlRun -t -c "ssh $SSH_OPTS ${SSH_USER}@${SSH_MACHINE} 'cat /etc/redhat-release'"
 }
 
+# verify that a kernel command line argument was passed from the blueprint (this is added to the blueprint in ../test_cli.sh)
+check_kernel_cmdline() {
+    rlRun -t -c "ssh $SSH_OPTS ${SSH_USER}@${SSH_MACHINE} 'grep custom_cmdline_arg /proc/cmdline'" 0 \
+        "System booted from the image contains specified parameter on kernel command line"
+}

tests/cli/test_build_and_deploy_openstack.sh

@@ -60,6 +60,10 @@ version = "*"
 [[packages]]
 name = "rng-tools"
 version = "*"
+
+[customizations.kernel]
+append = "custom_cmdline_arg"
+
 __EOF__
 
         rlRun -t -c "$CLI blueprints push $TMP_DIR/http-with-rng.toml"

tests/cli/test_build_and_deploy_vmware.sh

@@ -82,6 +82,9 @@ version = "*"
 [[customizations.user]]
 name = "root"
 key = "$PUB_KEY"
+
+[customizations.kernel]
+append = "custom_cmdline_arg"
 __EOF__
 
         rlRun -t -c "$CLI blueprints push $TMP_DIR/vmware.toml"

tests/cli/test_compose_qcow2.sh

@@ -43,6 +43,9 @@ version = "*"
 [[customizations.user]]
 name = "root"
 key = "$PUB_KEY"
+
+[customizations.kernel]
+append = "custom_cmdline_arg"
 __EOF__
 
         rlRun -t -c "$CLI blueprints push $TMP_DIR/with-ssh.toml"

tests/test_cli.sh

@@ -15,6 +15,14 @@ function setup_tests {
         /%end/ && FLAG == 1 {print \"sed -i 's/.*PermitEmptyPasswords.*/PermitEmptyPasswords yes/' /etc/ssh/sshd_config\"; FLAG=2}
         {print}" \
         $1/composer/live-iso.ks
+
+    # append a section with additional option on kernel command line to example-http-server blueprint
+    # which is used for building of most of the images
+    cat >> $BLUEPRINTS_DIR/example-http-server.toml << __EOF__
+
+[customizations.kernel]
+append = "custom_cmdline_arg"
+__EOF__
 }
 
 function teardown_tests {