Add pike symlink to ocata

Link pike config to ocata folder to be able install Pike version by this formula.

Change-Id: Ic6dc7350c94653968959f14d3c632229d72e0f25
Related-PROD: PROD-15582
diff --git a/nova/files/pike b/nova/files/pike
new file mode 120000
index 0000000..d5e8ce2
--- /dev/null
+++ b/nova/files/pike
@@ -0,0 +1 @@
+ocata
\ No newline at end of file