Add port number to Ssh task

### Context
We have to be abble to specify the port number on ssh tasks to be abble to deploy and test on any platform.

### Description
A ```remote.port```parameter has been added to specify the ssh port to be used by remote tasks.
Default ssh port is still 22.

### Example : 
```
remote.server    = afzda120.toto.org
remote.user      = unixUser
remote.port      = 2222
```