contrail: Fix lintian packaging issues

* debhelper-but-no-misc-depends
* depends-on-build-essential-package-without-using-version
* python-script-but-no-python-dep
* extended-description-is-probably-too-short
* unused-override binary-without-manpage

Change-Id: I3fcb87af1a02b52d1c1db3bf33387a841015ff1c
Merge "contrail: Fix lintian packaging issues"