Replaced path to start-all.sh script.
Replaced path to start-all.sh script.

* Now all scripts should be placed in PATH of every OS
* savanna-hdp-img-01 may not work with this change

Change-Id: I0e891d594378a8b96a38a99c062a7b705e84a222

esikachev/scenario,redhat-openstack/sahara,openstack/sahara,esikachev/sahara-backup,esikachev/sahara-backup,henaras/sahara,esikachev/sahara-backup,matips/iosr-2015,zhujzhuo/Sahara,keedio/sahara,openstack/sahara,matips/iosr-2015,xme1226/sahara,zhujzhuo/Sahara,tellesnobrega/storm_plugin,bigfootproject/sahara,esikachev/scenario,zhangjunli177/sahara,esikachev/scenario,zhujzhuo/Sahara,egafford/sahara,mapr/sahara,mapr/sahara,henaras/sahara,citrix-openstack-build/sahara,crobby/sahara,citrix-openstack-build/sahara,keedio/sahara,zhangjunli177/sahara,bigfootproject/sahara,matips/iosr-2015,tellesnobrega/storm_plugin,ekasitk/sahara,ekasitk/sahara,crobby/sahara,crobby/sahara,bigfootproject/sahara,keedio/sahara,zhangjunli177/sahara,henaras/sahara,citrix-openstack-build/sahara,egafford/sahara,redhat-openstack/sahara,redhat-openstack/sahara,tellesnobrega/storm_plugin,ekasitk/sahara,tellesnobrega/sahara,rnirmal/savanna,tellesnobrega/sahara,rnirmal/savanna,xme1226/sahara,mapr/sahara,xme1226/sahara