api: Fix annotations on iso related cmd

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
cli: give filter option only when output 'tabularized' is enabled

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
cli: fix cloudmonkey's pipe-ability

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
Conditionally show select SG step

Only show select security group step if at least one guest network
with SecurityGroup service is selected.
Document procedure to choose default System Offering for System VMs

Signed-off-by: Radhika PC <radhika.puthiyetath@citrix.com>
CLOUDSTACK-1048