ci: hclogvet does not run on entire codebase

[jrasell]

hclogvet is currently triggered within CI (via our makefile) using the command hclogvet . which does not run across all sub-directories within the Nomad project. In order to run this correctly, hclogvet should be triggered with the argument ./... and when done, the following errors are found:

client/widmgr/widmgr.go:124:16: invalid number of log arguments to Warn (1 valid pair only)
# github.com/hashicorp/nomad/client/allocrunner/taskrunner
# [github.com/hashicorp/nomad/client/allocrunner/taskrunner]
client/allocrunner/taskrunner/api_hook.go:100:19: invalid number of log arguments to Debug (1 valid pair only)
client/allocrunner/taskrunner/dynamic_users_hook.go:80:17: invalid number of log arguments to Error (1 valid pair only)
client/allocrunner/taskrunner/identity_hook.go:137:19: invalid number of log arguments to Error (1 valid pair only)
client/allocrunner/taskrunner/identity_hook.go:151:19: invalid number of log arguments to Warn (1 valid pair only)
# github.com/hashicorp/nomad/client
# [github.com/hashicorp/nomad/client]
client/alloc_endpoint.go:278:18: invalid number of log arguments to Info (1 valid pair only)
client/client.go:1335:18: invalid number of log arguments to Error (2 valid pairs only)
# github.com/hashicorp/nomad/scheduler
# [github.com/hashicorp/nomad/scheduler]
scheduler/scheduler_system.go:365:18: invalid number of log arguments to Debug (1 valid pair only)
# github.com/hashicorp/nomad/nomad
# [github.com/hashicorp/nomad/nomad]
nomad/job_endpoint.go:2110:17: invalid number of log arguments to Error (1 valid pair only)
nomad/leader.go:2627:15: invalid number of log arguments to Error (1 valid pair only)
nomad/leader.go:2656:15: invalid number of log arguments to Error (1 valid pair only)
nomad/locks.go:60:17: invalid number of log arguments to Error (1 valid pair only)
nomad/locks.go:149:17: invalid number of log arguments to Error (1 valid pair only)

All but one error is easily fixable. The problem found at client/alloc_endpoint.go:278 is a false positive as hclogvet is unable to understand the log line is being passed an array of k/v pairs as its arguments. hclogvet will need to be updated, before CI can be modified to run the command correctly.