[Platform] Universe fails to create if user-supplied certificate is selected

[ajcaldera1]

When creating a universe with YSQL enabled, node-to-node encryption, and node-to-client encryption enabled, and passing a pre-uploaded certificate that had been previously uploaded to Yugaware via the Certificates menu, it fails with the following log message:

Failed to execute task java.util.concurrent.FutureTask@3d8f859e, hit error java.lang.RuntimeException: 2020-06-10 15:24:07,363 INFO: Found gcp cloud credentials in env.
2020-06-10 15:24:08,367 INFO: URL being requested: GET https://compute.googleapis.com/compute/beta/projects/yugabyte/aggregated/instances?filter=%28status+eq+RUNNING%29+%28name+eq+yb-1-ac-ysql-tls-test-2-n3%29&alt=json&maxResults=1
2020-06-10 15:24:08,367 INFO: Attempting refresh to obtain initial access_token
2020-06-10 15:24:08,386 INFO: Refreshing access_token
2020-06-10 15:24:08,737 INFO: Copying package from local '/opt/yugabyte/releases/2.1.8.0-b2/yugabyte-2.1.8.0-b2-centos-x86_64.tar.gz' to remote '/tmp/yugabyte-2.1.8.0-b2-centos-x86_64.tar.gz'
2020-06-10 15:24:23,507 INFO: Configuring Instance: yb-1-ac-ysql-tls-test-2-n3
2020-06-10 15:24:23,507 INFO: Creating and copying over client TLS certificate
2020-06-10 15:24:23,875 INFO: Connected (version 2.0, client OpenSSH_7.4)
2020-06-10 15:24:24,164 INFO: Authentication (publickey) successful!
2020-06-10 15:24:24,820 INFO: [chan 2] Opened sftp connection (server version 3)
Traceback (most recent call last):
  File "/opt/yugabyte/devops/python_virtual_env/bin/ybcloud.py", line 4, in <module>
    __import__('pkg_resources').run_script('ybops==0.4', 'ybcloud.py')
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/pkg_resources/__init__.py", line 666, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1462, in run_script
    exec(code, namespace, namespace)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/EGG-INFO/scripts/ybcloud.py", line 15, in <module>
    YbCloud().run()
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/ybops/cloud/ybcloud.py", line 54, in run
    self.options.func(self.options)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/ybops/cloud/common/method.py", line 76, in callback_wrapper
    self.callback(args)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/ybops/cloud/common/method.py", line 581, in callback
    self.cloud.generate_client_cert(self.extra_vars, ssh_options)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/ybops/cloud/common/cloud.py", line 253, in generate_client_cert
    'yugabytedb.crt'))
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/ybops-0.4-py2.7.egg/ybops/utils/remote_shell.py", line 46, in put_file
    return self.ssh_conn.put(local_path, remote_path)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/fabric/connection.py", line 648, in put
    return Transfer(self).put(*args, **kwargs)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/fabric/transfer.py", line 225, in put
    sftp.put(localpath=local, remotepath=remote)
  File "/opt/yugabyte/devops/python_virtual_env/lib/python2.7/site-packages/paramiko/sftp_client.py", line 757, in put
    file_size = os.stat(localpath).st_size
OSError: [Errno 2] No such file or directory: '/opt/yugabyte/yugaware/data/certs/d33a1fc7-5d95-483c-a8c9-77323390ad86/831c07a5-2b8e-420e-9e21-70db343dbc69/yugabytedb.crt'.

If I examine the contents of that directory in the yugaware container, I see:

bash-4.4# pwd
/opt/yugabyte/yugaware/data/certs/d33a1fc7-5d95-483c-a8c9-77323390ad86/831c07a5-2b8e-420e-9e21-70db343dbc69
bash-4.4# ls -ltr
total 8
-rw-r--r--    1 root     root          1277 Jun 10 15:08 ca.root.crt
-rw-r--r--    1 root     root          1675 Jun 10 15:08 ca.key.pem