test/amazon/ebs: Add acceptance test for Session Manager Interface connectivity
test/amazon/ebs: Add acceptance test for Session Manager Interface connectivity

Test Results
```
...

2020/10/29 09:35:39 ui:     test: Starting session with SessionId: wilken-00bcfae4d314f54e7
2020/10/29 09:35:40 [DEBUG] TCP connection to SSH ip/port failed: dial tcp [::1]:8047: connect: connection refused
2020/10/29 09:35:40 ui:     test: Port 8047 opened for sessionId wilken-00bcfae4d314f54e7.
2020/10/29 09:35:45 [INFO] Attempting SSH connection to localhost:8047...
2020/10/29 09:35:45 [DEBUG] reconnecting to TCP connection for SSH
2020/10/29 09:35:45 ui:     test: Connection accepted for session wilken-00bcfae4d314f54e7.
2020/10/29 09:35:45 [DEBUG] handshaking with SSH
2020/10/29 09:35:45 [DEBUG] SSH handshake err: ssh: handshake failed: ssh: invalid packet length, packet too large
2020/10/29 09:35:52 [INFO] Attempting SSH connection to localhost:8047...
2020/10/29 09:35:52 [DEBUG] reconnecting to TCP connection for SSH
2020/10/29 09:35:52 [DEBUG] handshaking with SSH
2020/10/29 09:35:52 [DEBUG] handshake complete!
2020/10/29 09:35:52 [DEBUG] Opening new ssh session
2020/10/29 09:35:53 [INFO] agent forwarding enabled
2020/10/29 09:35:53 ui: ==> test: Connected to SSH!
2020/10/29 09:35:53 Running the provision hook
2020/10/29 09:35:53 ui: ==> test: Stopping the source instance...
2020/10/29 09:35:53 ui:     test: Stopping instance
2020/10/29 09:35:54 ui: ==> test: Waiting for the instance to stop...
2020/10/29 09:36:25 ui: ==> test: Creating AMI packer-ssm-test-1603978447 from instance i-0853cb6186a3406d5
2020/10/29 09:36:25 ui:     test: AMI: ami-0868a41bbb2df77b3
2020/10/29 09:36:25 ui: ==> test: Waiting for AMI to become ready...
2020/10/29 09:37:59 ui: ==> test: Terminating the source AWS instance...
2020/10/29 09:37:59 ui error: ==> test: Bad exit status: -1
2020/10/29 09:38:15 ui: ==> test: Cleaning up any extra volumes...
2020/10/29 09:38:15 ui: ==> test: No volumes to clean up, skipping
2020/10/29 09:38:15 ui: ==> test: Deleting temporary security group...
2020/10/29 09:38:16 ui: ==> test: Deleting temporary keypair...
2020/10/29 09:38:16 Deregistering image ID (ami-0868a41bbb2df77b3) from region (us-east-1)
2020/10/29 09:38:17 Deregistered AMI id: ami-0868a41bbb2df77b3
2020/10/29 09:38:17 Deleted snapshot: snap-09602f15994bc9f51
--- PASS: TestBuilderAcc_SessionManagerInterface (249.87s)
PASS

```

rnaveiras/packer,mitchellh/packer,ricardclau/packer,hashicorp/packer,rnaveiras/packer,ricardclau/packer,hashicorp/packer,pecigonzalo/packer,mitchellh/packer,rnaveiras/packer,pecigonzalo/packer,hashicorp/packer,ricardclau/packer,rnaveiras/packer,ricardclau/packer,mitchellh/packer,hashicorp/packer,pecigonzalo/packer,rnaveiras/packer,mitchellh/packer,pecigonzalo/packer,ricardclau/packer,ricardclau/packer,rnaveiras/packer,mitchellh/packer