factory fails when kernel parameter config is empty

[bergwolf]

When kernel parameter is set to empty, vm factory fails the vm config comparison but look closely the two config values are actually the same.

hypervisor config does not match, base: {HypervisorType:qemu HypervisorConfig:{NumVCPUs:0 DefaultMaxVCPUs:2 MemorySize:0 DefaultBridges:1 Msize9p:81920 MemSlots:10 KernelParams:[] HypervisorParams:[] KernelPath:/usr/share/kata-containers/vmlinuz-4.14.67.11-137.container ImagePath: InitrdPath:/golang/src/github.com/kata-containers/osbuilder/kata-containers-initrd.img FirmwarePath: MachineAccelerators: HypervisorPath:/usr/bin/qemu-lite-system-x86_64 BlockDeviceDriver:virtio-scsi HypervisorMachineType:pc MemoryPath: DevicesStatePath: EntropySource:/dev/urandom customAssets:map[] DisableBlockDeviceUse:false EnableIOThreads:false Debug:true MemPrealloc:false HugePages:false Realtime:false Mlock:false DisableNestingChecks:false UseVSock:false HotplugVFIOOnRootBus:false BootToBeTemplate:false BootFromTemplate:false DisableVhostNet:false} AgentType:kata AgentConfig:{LongLiveConn:false UseVSock:false} ProxyType:noopProxy ProxyConfig:{Path: Debug:false}}. new: {HypervisorType:qemu HypervisorConfig:{NumVCPUs:0 DefaultMaxVCPUs:2 MemorySize:0 DefaultBridges:1 Msize9p:81920 MemSlots:10 KernelParams:[] HypervisorParams:[] KernelPath:/usr/share/kata-containers/vmlinuz-4.14.67.11-137.container ImagePath: InitrdPath:/golang/src/github.com/kata-containers/osbuilder/kata-containers-initrd.img FirmwarePath: MachineAccelerators: HypervisorPath:/usr/bin/qemu-lite-system-x86_64 BlockDeviceDriver:virtio-scsi HypervisorMachineType:pc MemoryPath: DevicesStatePath: EntropySource:/dev/urandom customAssets:map[] DisableBlockDeviceUse:false EnableIOThreads:false Debug:true MemPrealloc:false HugePages:false Realtime:false Mlock:false DisableNestingChecks:false UseVSock:false HotplugVFIOOnRootBus:false BootToBeTemplate:false BootFromTemplate:false DisableVhostNet:false} AgentType:kata AgentConfig:{LongLiveConn:false UseVSock:false} ProxyType:noopProxy ProxyConfig:{Path: Debug:false}}