findbugs: unsynchronized initialization of non-volatile static field

This method contains an unsynchronized lazy initialization of a
non-volatile static field. Because the compiler or processor may reorder
instructions we need to make the field volatile

findbugs reason:
LI: Incorrect lazy initialization of static field (LI_LAZY_INIT_STATIC)

Change-Id: I1e0f8e380edd20d9a9ae3f99dfb82df5736786f9
Signed-off-by: Shahar Havivi <shavivi@redhat.com>