Fix LV status parsing to accept newer LVM
Fix LV status parsing to accept newer LVM

LVM version 2.02.93 (or at least, sometimes after .88) has extend the
lv_attr field with two more flag; we only care about the first digit,
so let's change the "!= 6" check to "< 6".

Thanks to Robin H Johnson <robbat2@gentoo.org> for finding this issue.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: René Nussbaumer <bc755ac45a0e799d1d490cba76febc56d80cc5fc@google.com>

ganeti/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,bitemyapp/ganeti,grnet/snf-ganeti,yiannist/ganeti,leshchevds/ganeti,yiannist/ganeti,ganeti/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,mbakke/ganeti,onponomarev/ganeti,apyrgio/ganeti,andir/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/ganeti,andir/ganeti,onponomarev/ganeti,dimara/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,leshchevds/ganeti,mbakke/ganeti,dimara/ganeti