INT-3537 RemoteFileTemplate Close Stream

JIRA: https://jira.spring.io/browse/INT-3537

Stream not closed if session cannot be created.

Add `try {} finally {}`.

__cherry-pick to 4.0.x, 3.0.x__

Conflicts:
	spring-integration-file/src/main/java/org/springframework/integration/file/remote/RemoteFileTemplate.java
	spring-integration-ftp/src/test/java/org/springframework/integration/ftp/session/FtpRemoteFileTemplateTests.java