Bump up maximum number of open files
Bump up maximum number of open files

Large cluster will easily reach the default value so we increase it.

Signed-off-by: Sébastien Han <c944cdd58d18a32bd34d661eafe66112d96c6cc1@enovance.com>

thetrav/ceph-ansible,guits/ceph-ansible,travmi/ceph-ansible,AcalephStorage/ceph-ansible,albertomurillo/ceph-ansible,ltangeman/ceph-ansible,jfcoz/ceph-ansible,dang/ceph-ansible,msambol/ceph-ansible,mattt416/ceph-ansible,leseb/ceph-ansible-1,shinespb/ceph-ansible,bjne/ceph-ansible,nkmail/ceph-ansible,Abhishekvrshny/ceph-ansible,PiotrProkop/ceph-ansible,jtaleric/ceph-ansible,Miand/ceph-ansible-centos-6.6,Abhishekvrshny/ceph-ansible,lyandrew/ceph-ansible,WingkaiHo/ceph-ansible,thetrav/ceph-ansible,jtaleric/ceph-ansible,leseb/ceph-ansible-1,sheepkiller/ceph-ansible,bengland2/ceph-ansible,thiagodasilva/ceph-ansible,fgal/ceph-ansible,Miand/ceph-ansible-centos-6.6,ceph/ceph-ansible,jsaintrocc/ceph-ansible,SpringerPE/ansible-ceph,WingkaiHo/ceph-ansible,ltangeman/ceph-ansible,rootfs/ceph-ansible,lejonet/ansible-ceph-common,font/ceph-ansible,albertomurillo/ceph-ansible,dang/ceph-ansible,albertomurillo/ceph-ansible,thiagodasilva/ceph-ansible,bengland2/ceph-ansible,rootfs/ceph-ansible,verdurin/ceph-ansible-1,fgal/ceph-ansible,jsaintrocc/ceph-ansible,lyandrew/ceph-ansible,sheepkiller/ceph-ansible,WingkaiHo/ceph-ansible,shinespb/ceph-ansible,msambol/ceph-ansible,mcsage/ceph-ansible,verdurin/ceph-ansible-1,AcalephStorage/ceph-ansible,jfcoz/ceph-ansible,font/ceph-ansible,PiotrProkop/ceph-ansible,guits/ceph-ansible,nkmail/ceph-ansible,mcsage/ceph-ansible,mattt416/ceph-ansible,travmi/ceph-ansible,bjne/ceph-ansible,ceph/ceph-ansible