Eliminating use of Apache Karaf CLI client and of ONOS_USE_SSH env. variable.

All CLI access is now through the raw SSH client.
To enable passwordless access, the 'onos-user-key' tool should be used to add user keys.
Added 'onos-user-password' tool in the similar vein and usage as the 'onos-user-key' tool.

Change-Id: Ic5482fc8012369edc818691402ba45d13f130452
diff --git a/tools/test/scenarios/setup.xml b/tools/test/scenarios/setup.xml
index dd3db19..845380e 100644
--- a/tools/test/scenarios/setup.xml
+++ b/tools/test/scenarios/setup.xml
@@ -30,8 +30,7 @@
                   requires="Kill-${#},Push-Bits-${#},Push-Bits"/>
 
             <step name="Secure-SSH-${#}" requires="Install-${#}"
-                  exec="onos-secure-ssh -u ${ONOS_WEB_USER} -p ${ONOS_WEB_PASS} ${OC#}"
-                  if="${ONOS_USE_SSH}"/>
+                  exec="onos-secure-ssh -u ${ONOS_WEB_USER} -p ${ONOS_WEB_PASS} ${OC#}"/>
 
             <step name="Wait-for-Start-${#}" exec="onos-wait-for-start ${OC#}"
                   requires="Install-${#},~Secure-SSH-${#}"/>