sysctl module: fixed issue when checks_after fail on comparing keys with...

Fixed:
failed: [host] => (item=net.ipv4.tcp_wmem) => {"failed": true, "item": "net.ipv4.tcp_wmem"}
msg: checks_after failed with: key seems not set to value even after update/sysctl, founded : <4096     87380   524288>, wanted : <4096 87380 524288>

When sysctl module compare key with values separated by spaces with values read from file it fail.