Move hypervisor system to separate method

Similar to the code we've been building elsewhere, move Hypervisor
system to a separate method, and avoid lambdas.

Tested: Code compiles. Tested as part of top patch.

Change-Id: Iac49b1d2e216bf785aa0b0aced6d169457ef5a3c
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>