Only start and enable agent if agent_startup is set to automatic
Only start and enable agent if agent_startup is set to automatic

Signed-off-by: Eric Blevins <0007e31fe99abb012b41e514a0f19b76495ad8c3@kmilearning.com>

opscode-cookbooks/sql_server,chef-cookbooks/sql_server,chef-cookbooks/sql_server,opscode-cookbooks/sql_server