base: drop support for old Ubuntu version/Solaris

- Remove support for grub1
- Always set elevator=deadline, no "server" flavor anymore
- Remove $::lsbdistid checks that were there from the Solaris era
- Remove base::tcptweaks, obsolete since Ubuntu Oneiric 11.10
- Install lldpd everywhere (no < 10.04 hosts without it anymore)

Change-Id: I35b7bd4d811088925b6792c7d4402a439cbfa9a4
interface: drop support for Ubuntu < 10.04

Change-Id: Ifb5f1761c63971f0d6320c3f8631b3857a325de2