Add readme file for virtual-mcp-sl-os template

Also were deleted unnecessary salt steps.

Change-Id: I0628e1ec555b8dbe4a680934a2bcf67330c4cd03
diff --git a/tcp_tests/templates/virtual-mcp-sl-os/Readme.txt b/tcp_tests/templates/virtual-mcp-sl-os/Readme.txt
new file mode 100644
index 0000000..b4fa30f
--- /dev/null
+++ b/tcp_tests/templates/virtual-mcp-sl-os/Readme.txt
@@ -0,0 +1,7 @@
+Template for deploying mitaka/newton models:
+- virtual-mcp-mitaka-dvr
+- virtual-mcp-mitaka-ovs
+- virtual-mcp-newton-dvr
+- virtual-mcp-newton-ovs
+
+Used by maintenance team.
\ No newline at end of file