Fix AWS IP regex by double-escaping backslashes for ruby in Vagrantfile
Fix AWS IP regex by double-escaping backslashes for ruby in Vagrantfile

[Fixes #116179905]

Signed-off-by: Stephen Levine <72d5489bdb659bea8b15ba0173fe796f11329883@pivotal.io>

pivotal-cf/micropcf,pivotal-cf/micropcf