Adds initial usrp ansible role content

Change-Id: I4e1e308aa7e9e2f6db04bc8a344b8a4f8f63c61a
diff --git a/files/ettusresearch.gpg b/files/ettusresearch.gpg
new file mode 100644
index 0000000..cdd58af
--- /dev/null
+++ b/files/ettusresearch.gpg
@@ -0,0 +1,28 @@
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