fixes #965 and fixes #964

Signed-off-by: Amos Benari <abenari@redhat.com>

override default operators in the suggestion list to prevent syntax that doesn't make sence for example, in hosts page 'class != foo' will get any host that has class that is not foo if a host has two class foo and bar it will be in the list because bar != foo this kind of queries doesn't make sence and there for removed from the suggestion list....

fixes #259 - Ability to search Hosts by Parameters

adds search to hosts refs #719