Reduce box size by 2.5GB by removing bosh-agent tmp dir
Reduce box size by 2.5GB by removing bosh-agent tmp dir

[Finishes #111255566]

Signed-off-by: David Wadden <ff4ebafbe4a7d77cde45f9afefafd7a5dfa94f36@pivotal.io>

pivotal-cf/micropcf,pivotal-cf/micropcf