Avoid using LRU hashmap because they needs lots of memory (#162)

Even when the feature is not on memory with latest
showing double the normal use

Note: In general relying on LRU to evict old entries
isn;t recommended because its hard to perdict when
an entry will be deleted
at somepoint we need to add eviction logic in userspace

Signed-off-by: msherif1234 <mmahmoud@redhat.com>