avoid slash characters in task ids

Our REST API cannot handle that.
ceph: return decompiled crush map in text format.

This is easier to read.
ceph: try to unmount OSD after removal
ceph: only use 64 PGs by default (same default as ceph default pools)
ceph: allow to specify crush ruleset on pool creation
ocf agent: retry get_vmlist if we get an empty list

Make HA more stable if pmxcfs is not reachable for a short period (for example
if you restart the service). Some users reported they get empty VM list
when there is very high load on a server.
bump version to 3.1-34