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/bin/onos-user-key b/tools/test/bin/onos-user-key
index b324c1a..df4379f 100755
--- a/tools/test/bin/onos-user-key
+++ b/tools/test/bin/onos-user-key
@@ -1,6 +1,6 @@
 #!/bin/bash
 # -----------------------------------------------------------------------------
-# Adds or removes a user key for managing passwordless loging to ONOS console.
+# Adds or removes a user key for managing passwordless login to ONOS console.
 # -----------------------------------------------------------------------------
 
 [ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1