fix(aws): error with other instances without tags

while starting the cluster, and having already other non-kubernetes
instances active without tags, an KeyError throwed.
enhancement(aws): checks for existing kubernetes vpc first

without this check, kube-up creates a new vpc every time. Now it will
reuse the vpc tagged Kubernetes.
enhancement(aws): using iam role to pass aws credentials
enhancement(aws): added logging variable and more verbose output
fix(aws): fix with non us standard region
fix(aws): cloud provider wasn't set, corrected cloud config syntax
Specify AWS_DEFAULT_REGION to match configured region

The AWS CLI is configured with a default region, but it might not match
the configured Kubernetes region.  Specify the region to be sure.
done
Sticky Session Implementation
- Added process to cleanup stale session affinity records
- Automatically set cloud provided load balancer for sticky session if the service requires it - Note, this only works on GCE right now.
- Changed sessionAffinityMap a map to pointers instead of structs to improve performance
- Commented out cookie and protocol from sessionAffinityDetail to avoid confusion as it is not yet implemented.
Remove an unneeded trip over the network when getting/listing pods.
Fix Issue #3002: kubectl get pods/log podname don't work well together
Add Host to PodSpec and add a predicate to make the scheduler work.
Merge pull request #3048 from saad-ali/3002

Fix Issue #3002: kubectl get pods/log podname don't work well together
Merge pull request #3047 from lavalamp/optimize

Remove an unneeded trip over the network when getting/listing pods.
Merge pull request #3045 from nikhiljindal/setApiVersion

Setting apiVersion in restful.WebService
Merge pull request #3031 from foleymic/master

Sticky Session Implementation
Merge branch 'master' of https://github.com/dutchcoders/kubernetes into dutchcoders-master

Conflicts:
	cluster/aws/config-default.sh
	cluster/saltbase/salt/kube-controller-manager/default
Add GKE as a provider.
Merge pull request #3046 from mbforbes/gkeTestsSecure

Add GKE as a provider.
Merge pull request #2651 from justinsb/specify_zone_to_ec2

Specify AWS_DEFAULT_REGION to match configured region