Load XOS certificates from files rather than embedding in the values file

Change-Id: Iebcba439adfdb8e9358067a0e84ab790b39a17d4
diff --git a/xos-core/pki/xos-core.key b/xos-core/pki/xos-core.key
new file mode 100644
index 0000000..61d1b95
--- /dev/null
+++ b/xos-core/pki/xos-core.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----