Allow ListSftp connection parameter

ListSftp and other Sftp processors should be able to add parameters

(like [-B buffer_size] [-b batchfile] [-c cipher]
[-D sftp_server_path] [-F ssh_config] [-i identity_file] [-l limit]
[-o ssh_option] [-P port] [-R num_requests] [-S program]
[-s subsystem | sftp_server] host
sftp [user@]host[:file ...]
sftp [user@]host[:dir[/]]
sftp -b batchfile [user@]host)

in order to edit the type of connection on Sftp Server.

For instance, I have this error on nifi:
2018-10-29 11:06:09,462 ERROR [Timer-Driven Process Thread-5] SimpleProcessLogger.java:254 ListSFTP[id=766ac418-27ce-335a-5b13-52abe3495592] Failed to perform listing on remote host due to java.io.IOException: Failed to obtain connection to remote host due to com.jcraft.jsch.JSchException: Auth fail: {}
java.io.IOException: Failed to obtain connection to remote host due to com.jcraft.jsch.JSchException: Auth fail
at org.apache.nifi.processors.standard.util.SFTPTransfer.getChannel(SFTPTransfer.java:468)
at org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:192)
at org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:156)
at org.apache.nifi.processors.standard.ListFileTransfer.performListing(ListFileTransfer.java:105)
at org.apache.nifi.processor.util.list.AbstractListProcessor.onTrigger(AbstractListProcessor.java:401)
at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1147)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:175)
at org.apache.nifi.controller.scheduling.QuartzSchedulingAgent$2.run(QuartzSchedulingAgent.java:140)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
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: com.jcraft.jsch.JSchException: Auth fail
at com.jcraft.jsch.Session.connect(Session.java:519)
at com.jcraft.jsch.Session.connect(Session.java:183)
at org.apache.nifi.processors.standard.util.SFTPTransfer.getChannel(SFTPTransfer.java:448)
... 15 common frames omitted

This can be avoided by connect to Sftp server with this string:
sftp  -o “controlmaster auto” username@sftp_server