meta-ibm: Update local.conf.sample

Update with the latest version from upstream.

Change-Id: I1a7da37b0457dab873afaf6445aca360d54b47ca
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/conf/local.conf.sample b/meta-ibm/conf/local.conf.sample
index 9680cf0..172631b 100644
--- a/meta-ibm/conf/local.conf.sample
+++ b/meta-ibm/conf/local.conf.sample
@@ -5,10 +5,10 @@
 DISTRO ?= "openbmc-openpower"
 PACKAGE_CLASSES ?= "package_rpm"
 SANITY_TESTED_DISTROS:append ?= " *"
-EXTRA_IMAGE_FEATURES = "debug-tweaks"
-USER_CLASSES ?= "buildstats image-prelink"
+EXTRA_IMAGE_FEATURES ?= "debug-tweaks"
+USER_CLASSES ?= "buildstats"
 PATCHRESOLVE = "noop"
-BB_DISKMON_DIRS = "\
+BB_DISKMON_DIRS ??= "\
     STOPTASKS,${TMPDIR},1G,100K \
     STOPTASKS,${DL_DIR},1G,100K \
     STOPTASKS,${SSTATE_DIR},1G,100K \
@@ -17,4 +17,4 @@
     ABORT,${DL_DIR},100M,1K \
     ABORT,${SSTATE_DIR},100M,1K \
     ABORT,/tmp,10M,1K"
-CONF_VERSION = "1"
+CONF_VERSION = "2"