Rework stratosphere ssp plugin

* add missing command entry in commands.properties
* migrate httpclient 3.x to 4.x
* fix the broken SspClient
* add webapp session checking in mock ssp server
CLOUDSTACK-6018: Increase dnsmasq dhcp-lease-max to 2100

Would able to accomodate one /21 network then.
(stratosphere-ssp plugin) Fix HttpClient4 connection leak

Replaced HttpClient#execute(HttpUriRequest) with
HttpClient#execute(HttpUriRequest,ResponseHandler<T>).
The former requires extra EntityUtils#consume(HttpEntity).
CLOUDSTACK-5967: GRE tunnel creation is failing

after network orchestrator refactor, only network elements providingg
services as defined by network offering, are invloved network design and
imlement phase. So OVS network element need to be enables as
'Connectivity' service provider to make GRE tunnels work. This fix
introduced 'Ovs' provider as Connectivity service provider.

Conflicts:
	server/src/com/cloud/network/NetworkServiceImpl.java
CLOUDSTACK-6087: Read max custom disk offering size from database,
rather than hard-coded max value of 1024
CLOUDSTACK-6089: Implement equals() method for ResourceTagResponse
so that the java Set can properly determine if a ResourceTagResponse
is unique. This ensures we don't get duplicate resource tags showing
up any time a UserVmResponse is crafted (which can be quite often
due to the way the responses are crafted).
CLOUDSTACK-6089: Use resource tag's key to determine match in
equals() method for ResourceTagResponse
CLOUDSTACK-6103: Pass VM iso information along with
PrepareForMigrationCommand, so that destination hypervisor can
mount pool. This further exposed an issue for KVM where iso
was not getting cleaned up upon successful migration, fixed as well.
CLOUDSTACK-6163 obfuscation of passwords in log
Add console proxy AltGR support and French keyboard support

Signed-off-by: Daan Hoogland <daan@onecht.net>
CLOUDSTACK-5986: Fix dnsmasq lease for VPC
CLOUDSTACK-5986: Fix dnsmasq lease judgement
CLOUDSTACK-6241: Fix default route for IPv6 network when IPv4 not used
CLOUDSTACK-5259: added 32 bit support for vhd-util