Fixes: #14826
aws_launch_configuration ebs_block_device only had selected properties in the set hash. I removed these to allow any changes to the block device config to force a new resource
```
% make testacc TEST=./builtin/providers/aws/ TESTARGS='-run=TestAccAWSLaunchConfiguration_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/29 01:08:55 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws/ -v -run=TestAccAWSLaunchConfiguration_ -timeout 120m
=== RUN TestAccAWSLaunchConfiguration_importBasic
--- PASS: TestAccAWSLaunchConfiguration_importBasic (32.89s)
=== RUN TestAccAWSLaunchConfiguration_basic
--- PASS: TestAccAWSLaunchConfiguration_basic (44.34s)
=== RUN TestAccAWSLaunchConfiguration_withBlockDevices
--- PASS: TestAccAWSLaunchConfiguration_withBlockDevices (28.98s)
=== RUN TestAccAWSLaunchConfiguration_updateRootBlockDevice
--- PASS: TestAccAWSLaunchConfiguration_updateRootBlockDevice (52.23s)
=== RUN TestAccAWSLaunchConfiguration_withSpotPrice
--- PASS: TestAccAWSLaunchConfiguration_withSpotPrice (23.04s)
=== RUN TestAccAWSLaunchConfiguration_withVpcClassicLink
--- PASS: TestAccAWSLaunchConfiguration_withVpcClassicLink (62.30s)
=== RUN TestAccAWSLaunchConfiguration_withIAMProfile
--- PASS: TestAccAWSLaunchConfiguration_withIAMProfile (51.62s)
=== RUN TestAccAWSLaunchConfiguration_withEncryption
--- PASS: TestAccAWSLaunchConfiguration_withEncryption (27.91s)
=== RUN TestAccAWSLaunchConfiguration_updateEbsBlockDevices
--- PASS: TestAccAWSLaunchConfiguration_updateEbsBlockDevices (62.98s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 386.308s
```
0f7de130b1