ValueError while parsing cgroup config

[as-polyakov]

We seem to incorrectly handle the CGroup (and possible other) config when doing

test case:

    a = pyslurm.slurmctld.config.Config.load()
    ctl_dict = a.to_dict()

config from Slurm:

root@slurm:/tmp$  scontrol show config

Cgroup Support Configuration:
AllowedRAMSpace         = 95.0%
AllowedSwapSpace        = 100.0%
CgroupMountpoint        = /sys/fs/cgroup
CgroupPlugin            = autodetect
ConstrainCores          = yes
ConstrainDevices        = yes
ConstrainRAMSpace       = yes
ConstrainSwapSpace      = yes
EnableControllers       = yes
EnableExtraControllers  = (null)
IgnoreSystemd           = yes
IgnoreSystemdOnFailure  = yes
MaxRAMPercent           = 100.0%
MaxSwapPercent          = 100.0%
MemorySwappiness        = (null)
MinRAMSpace             = 30MB
SystemdTimeout          = 1000 ms

Actual behavior:

ctl_dict = a.to_dict() 
File "pyslurm/core/slurmctld/config.pyx", line 225, in pyslurm.core.slurmctld.config.Config.to_dict  
File "pyslurm/utils/helpers.pyx", line 335, in pyslurm.utils.helpers.instance_to_dict 
File "pyslurm/core/slurmctld/config.pyx", line 234, in pyslurm.core.slurmctld.config.Config.cgroup_config.__get__ 
File "pyslurm/core/slurmctld/config.pyx", line 120, in pyslurm.core.slurmctld.config.CgroupConfig.from_ptr 
 ValueError: could not convert string to float: '95.0%'