Switch to lioadm for centos cinder

Centos/RHEL 7 doesn't support tgtd.  While the packages are still in
EPEL, there's no point in testing because nobody runs like this.
Switch cinder to use lioadm which uses LIO, and update package
installations.

Depends-On: I964917d13d9415223845ac17eb804ee7faceaf6f
Change-Id: Idc5a4e856bfc93e9dc650d565a98a8e9b3df3481

files/rpms/cinder

@@ -1,4 +1,5 @@
 iscsi-initiator-utils
 lvm2
 qemu-img
-scsi-target-utils # NOPRIME
+scsi-target-utils # not:rhel7,f24,f25 NOPRIME
+targetcli # dist:rhel7,f24,f25 NOPRIME

lib/cinder

@@ -109,7 +109,16 @@ CINDER_VOLUME_CLEAR=$(echo ${CINDER_VOLUME_CLEAR} | tr '[:upper:]' '[:lower:]')
 # https://bugs.launchpad.net/cinder/+bug/1180976
 CINDER_PERIODIC_INTERVAL=${CINDER_PERIODIC_INTERVAL:-60}
 
-CINDER_ISCSI_HELPER=${CINDER_ISCSI_HELPER:-tgtadm}
+# Centos7 switched to using LIO and that's all that's supported,
+# although the tgt bits are in EPEL we don't want that for CI
+if is_fedora; then
+    CINDER_ISCSI_HELPER=${CINDER_ISCSI_HELPER:-lioadm}
+    if [[ ${CINDER_ISCSI_HELPER} != "lioadm" ]]; then
+        die "lioadm is the only valid Cinder iscsi_helper config on this platform"
+    fi
+else
+    CINDER_ISCSI_HELPER=${CINDER_ISCSI_HELPER:-tgtadm}
+fi
 
 # Toggle for deploying Cinder under HTTPD + mod_wsgi
 CINDER_USE_MOD_WSGI=${CINDER_USE_MOD_WSGI:-False}
@@ -443,12 +452,10 @@ function init_cinder {
 function install_cinder {
     git_clone $CINDER_REPO $CINDER_DIR $CINDER_BRANCH
     setup_develop $CINDER_DIR
-    if [ "$CINDER_ISCSI_HELPER" = "tgtadm" ]; then
-        if is_fedora; then
-            install_package scsi-target-utils
-        else
-            install_package tgt
-        fi
+    if [[ "$CINDER_ISCSI_HELPER" == "tgtadm" ]]; then
+        install_package tgt
+    elif [[ "$CINDER_ISCI_HELPER" == "lioadm" ]]; then
+        install_package targetcli
     fi
 
     if [ "$CINDER_USE_MOD_WSGI" == "True" ]; then