Bug fix missing quantum-ha-tool attributes

Add missing attributes for quantum-ha-tool installation
and ensure file is installed.

Change-Id: Ifab4095a533f91defa733d473051b3932697af49
Removed wrong dhcp-agent service name in Ubuntu

Removed wrong, duplicate dhcp-agent service name attribute in Ubuntu platform

Change-Id: I1777fd35ccf49bd3978d4f1c046e2715441fba09
Merge "Bug fix missing quantum-ha-tool attributes"
Merge "Removed wrong dhcp-agent service name in Ubuntu"
Parameterize L3 and DHCP Agent Scheduler Classes

Parameterize the agent scheduler classes so we can override
them with custom schedulers.

Change-Id: Id26090c70d8460ecc28976de2164edafef55e684