[bat] Allow to set dns_nameserver and security_group

Change-Id: Ia59be85a0e6ba6204bb1ed20953ccf9d9dfb4d6f
DNS list is reversed priority.

Manifest
-------------
networks:
  - name: default
    type: manual
    cloud_properties:
      security_groups:
        xxxxxxx
      availability_zone: ap-northeast-1a
    dns:
      - 10.0.1.10
      - 10.0.0.2
    ...
-

Expected resolv.confd
-------
nameserver 10.0.1.10
nameserver 10.0.0.2

-
Actual resolv.conf
----------
nameserver 10.0.0.2
nameserver 10.0.1.10
nameserver 10.0.0.2
(10.0.0.2 is DHCP DNS )
-

Change-Id: I53de2ca11bd23d3d5561112180aff2da6fbae006
use tripwire when building stemcells

- only builds the tripwire database when the environment variable
  TW_LOCAL_PASSPHRASE is set
- stores a copy of tripwire.db in the stemcell, so it can be verified
  even if the running image is compromised

Change-Id: I5f8ff92a9d1aee9feb1061512f6e71f142149109
New micro version 0.8.1

Change-Id: I6b62b0e707927caf561b1cc1f1cd43e2955d1c07
Merge "[bat] Allow to set dns_nameserver and security_group"
Bosh agent 0.7.0

Change-Id: Ibea3c46c1baac5626989aa9693b50f03f3f8ac37
Merge "DNS list is reversed priority."
Merge "use tripwire when building stemcells"
merge from master