tuned [bootloader] plugin incorrectly escapes "cmdline" parameters with commas.

Issue

• I have created a custom tuned profile as show below:

# mkdir /etc/tuned/myprofile
# cat /etc/tuned/myprofile/tuned.conf
[main]
include=network-latency

[bootloader]
cmdline = isolcpus=0-1,2-3

• Because of the comma between 0-1 and 2-3, this gets turned by tuned into ['isolcpus=0-1', '2-3'] on the kernel command line, while it should be isolcpus=0-1,2-3.

Eg:1

# rpm -q tuned
tuned-2.3.0-11.el7.noarch

# cat /proc/cmdline 
BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=/dev/mapper/rhel-root ro rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.lv=rhel/root [\'isolcpus=0-1\', \'2-3\']

Eg:2

# rpm -q tuned 
tuned-2.3.0-11.el7_0.3.noarch

# cat /proc/cmdline 
BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=/dev/mapper/rhel-root ro rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.lv=rhel/root [\'isolcpus=0-1\', \'2-3\']

Eg:3:

# rpm -q tuned
tuned-2.4.1-1.el7.noarch

# cat /proc/cmdline 
BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=/dev/mapper/rhel-root ro rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.lv=rhel/root [\'isolcpus=0-1\', \'2-3\']