Moved all ONOS-specific sample configuration *.cfg files from directory

  tools/package/etc/

to directory

  tools/package/etc/samples/

Also, removed some comments detailing the handling of the configuration
files.

Change-Id: I4e995cd2af3289b6dbbcbf2d3530628d2b197aba
diff --git a/tools/package/etc/samples/org.onosproject.proxyarp.ProxyArp.cfg b/tools/package/etc/samples/org.onosproject.proxyarp.ProxyArp.cfg
new file mode 100644
index 0000000..4746c5b
--- /dev/null
+++ b/tools/package/etc/samples/org.onosproject.proxyarp.ProxyArp.cfg
@@ -0,0 +1,8 @@
+#
+# Sample configuration for onos-app-proxyarp.
+#
+
+#
+# Enable IPv6 Neighbor Discovery.
+#
+# ipv6NeighborDiscovery = false