Revert "Renamed bootstrap_vars for new syntax"

This reverts commit 1d0fdb799321f35d2015987f3dbc5c0268d78a1a.

Change-Id: I10e19d0c11e1276b3e31a244d3dc8534b5be5e0f
diff --git a/classes/cluster/virtual-mcp11-aio/extra.env b/classes/cluster/virtual-mcp11-aio/bootstrap_vars
similarity index 100%
rename from classes/cluster/virtual-mcp11-aio/extra.env
rename to classes/cluster/virtual-mcp11-aio/bootstrap_vars