Something seems wrong with machine timeout

We are seeing the following:

It appears like the exception type being captured may not be the right one in this method?

Thoughts? (not we have also set a very high startup timeout).

```
WARNING: Unexpected exception encountered while provisioning agent dlsl-cent7
jenkins.plugins.openstack.compute.internal.Openstack$ActionFailed: Read timed out
at jenkins.plugins.openstack.compute.internal.Openstack.bootAndWaitActive(Openstack.java:478)
at jenkins.plugins.openstack.compute.JCloudsSlaveTemplate.provision(JCloudsSlaveTemplate.java:312)
at jenkins.plugins.openstack.compute.JCloudsSlaveTemplate.provision(JCloudsSlaveTemplate.java:243)
at jenkins.plugins.openstack.compute.JCloudsSlaveTemplate.provisionSlave(JCloudsSlaveTemplate.java:203)
at jenkins.plugins.openstack.compute.JCloudsCloud$NodeCallable.call(JCloudsCloud.java:270)
at jenkins.plugins.openstack.compute.JCloudsCloud$NodeCallable.call(JCloudsCloud.java:256)
at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: ConnectionException{message=Read timed out, status=0}
at org.openstack4j.connectors.okhttp.HttpExecutorServiceImpl.invoke(HttpExecutorServiceImpl.java:56)
at org.openstack4j.connectors.okhttp.HttpExecutorServiceImpl.execute(HttpExecutorServiceImpl.java:30)
at org.openstack4j.core.transport.internal.HttpExecutor.execute(HttpExecutor.java:51)
at org.openstack4j.openstack.internal.BaseOpenStackService$Invocation.execute(BaseOpenStackService.java:208)
at org.openstack4j.openstack.internal.BaseOpenStackService$Invocation.execute(BaseOpenStackService.java:202)
at org.openstack4j.openstack.compute.internal.ServerServiceImpl.boot(ServerServiceImpl.java:135)
at org.openstack4j.openstack.compute.internal.ServerServiceImpl.bootAndWaitActive(ServerServiceImpl.java:143)
at jenkins.plugins.openstack.compute.internal.Openstack._bootAndWaitActive(Openstack.java:485)
at jenkins.plugins.openstack.compute.internal.Openstack.bootAndWaitActive(Openstack.java:451)
... 10 more
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
```