Alloc.{GetAlloc,List} ACL enforcement

Add job endpoint ACL

Fix batch handling of complete allocs/node drains

This PR fixes:
* An issue in which a node-drain that contains a complete batch alloc
would cause a replacement
* An issue in which allocations with the same name during a scale
down/stop event wouldn't be properly stopped.
* An issue in which batch allocations from previous job versions may not
have been stopped properly.

Fixes https://github.com/hashicorp/nomad/issues/3210

Worker waits til max ModifyIndex across EvalsByJob

This PR fixes a scheduling race condition in which the plan results from
one invocation of the scheduler were not being considered by the next
since the Worker was not waiting for the correct index.

Fixes https://github.com/hashicorp/nomad/issues/3198

Sort /v1/agent/servers output

This PR sorts the output of the endpoint since its results are used as
part of Consul checks to avoid the value changing unnecessarily.

Fixes https://github.com/hashicorp/nomad/issues/3211

Non-locked accessors to common Node fields

This PR removes locking around commonly accessed node attributes that do
not need to be locked. The locking could cause nodes to TTL as the
heartbeat code path was acquiring a lock that could be held for an
excessively long time. An example of this is when Vault is inaccessible,
since the fingerprint is run with a lock held but the Vault
fingerprinter makes the API calls with a large timeout.

Fixes https://github.com/hashicorp/nomad/issues/2689

Adding missing <

Deployment.GetDeployment ACL enforcement

Fix UUID search with hyphens

Prometheus metrics