Description of problem:
Hosted Engine VM does not update the memory inside the guest after editing it from the RHVM portal. 

Version-Release number of selected component (if applicable):
ovirt-hosted-engine-setup-2.1.4-1.el7ev.noarch
ovirt-hosted-engine-ha-2.1.8-1.el7ev.noarch
ovirt-engine-4.1.9.1-0.1.el7.noarch

How reproducible:
Always 

Steps to Reproduce:
1. Edit the hosted engine VM configuration for memory. (increase or decrease) 
2. Check the memory inside the guest Hosted Engine.
3. There is no change. 

Actual results:
Hosted Engine memory change does not reflect. (when mem was 4086) 

# free -m
              total        used        free      shared  buff/cache   available
Mem:           3778        1599        1691          39         488        1889
Swap:          8191           0        8191



Expected results: (according to https://access.redhat.com/solutions/964693) 
Change should be reflected on the fly. (when mem was 5000 and after HE VM reboot) 

# free -m
              total        used        free      shared  buff/cache   available
Mem:           4676        1750        2391          39         534        2632
Swap:          8191           0        8191


Additional info:
1] It does update the OVF store with the new memSize: 

** Increase from 4086 to 5000 so the vm.conf shows it correct: 

 # cat /var/run/ovirt-hosted-engine-ha/vm.conf 
cpuType=SandyBridge
emulatedMachine=pc-i440fx-rhel7.3.0
vmId=5a1dab2d-c19f-4e51-a225-71882c535084
smp=2
memSize=5000  <<=====
maxVCpus=16

** But the vdsClient does not reflect the change: 

	guestDiskMapping = {'QEMU_DVD-ROM_QM00003': {'name': '/dev/sr0'}, '09fbcc4a-3f41-4959-a': {'name': '/dev/vda'}}
	vmType = kvm
	smp = 2
	display = vnc
	memSize = 4086  <<=====
	cpuType = SandyBridge
	spiceSecureChannels = smain,sdisplay,sinputs,scursor,splayback,srecord,ssmartcard,susbredir
	statusTime = 5325240010
	vmName = HostedEngine
	guestIPs = 
	pauseCode = NOERR
	maxVCpus = 16


WORKAROUND:
===========

-Enable global mainteance. 
- PoweOff the Hosted Engine VM.
- Start the Hosted Engine VM. 

Now the changes are reflected in the guest.