In order to satisify scenarios where a lifecycle is block is used, we
would need the AWS ALB name field to be autogenerated. WE follow the
same work as AWS ELB, we prefix it with `tl-lb-`
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSALB_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2016/09/08 12:43:40 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSALB_ -timeout
120m
=== RUN TestAccAWSALB_basic
--- PASS: TestAccAWSALB_basic (79.81s)
=== RUN TestAccAWSALB_generatedName
--- PASS: TestAccAWSALB_generatedName (93.81s)
=== RUN TestAccAWSALB_namePrefix
--- PASS: TestAccAWSALB_namePrefix (73.48s)
=== RUN TestAccAWSALB_tags
--- PASS: TestAccAWSALB_tags (181.32s)
=== RUN TestAccAWSALB_noSecurityGroup
--- PASS: TestAccAWSALB_noSecurityGroup (66.03s)
=== RUN TestAccAWSALB_accesslogs
--- PASS: TestAccAWSALB_accesslogs (130.82s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 625.285s
```
This commit adds an `arn` field to `aws_alb` and `aws_alb_target_group`
resources, in order to present a more coherant user experience to people
using resource variables in fields suffixed "arn".
This commit adds a resource, acceptance tests and documentation for the
new Application Load Balancer (aws_alb). We choose to use the name alb
over the package name, elbv2, in order to avoid confusion.
This is the first in a series of commits to fully support the new
resources necessary for Application Load Balancers.
stack72