SEBA-464 Work around watcher exhaustion after repeated builds of SiaB

Change-Id: I6366374e9fbadaf3194bd6a33cd90da0ca4ddeb2
diff --git a/seba-in-a-box/Makefile b/seba-in-a-box/Makefile
index e8394cc..b522ac5 100644
--- a/seba-in-a-box/Makefile
+++ b/seba-in-a-box/Makefile
@@ -137,6 +137,7 @@
 # SEBA-440 Sometimes VOLTHA install fails with 'namespaces "voltha" not found'
 # Work around by repeatedly trying to install the chart until it succeeds
 $(M)/voltha: | $(M)/kafka-running $(INFRA_PREREQS) $(M)/etcd-operator-ready
+	sudo sh -c "echo 1048576 > /proc/sys/fs/inotify/max_user_watches"
 	cd $(WORKSPACE)/cord/helm-charts; helm dep up voltha
 	cd $(WORKSPACE)/cord/helm-charts; \
 		for i in 1 2 3; \