MT#6517 unify Debian Packaging

Use Sipwise Development Team <support@sipwise.com> as Maintainer.

debian/control

@@ -1,7 +1,7 @@
 Source: collectd
 Section: utils
 Priority: optional
-Maintainer: Sebastian Harl <tokkee@debian.org>
+Maintainer: Sipwise Development Team <support@sipwise.com>
 Build-Depends: debhelper (>= 5), dpkg-dev (>= 1.14.10), po-debconf, dpatch,
  bison, flex, autotools-dev, libltdl-dev, pkg-config,
  iproute-dev [!alpha !amd64 !hppa !ia64 !ppc64 !mips !mipsel !kfreebsd-i386 !kfreebsd-amd64],