[Finder] Fix SplFileInfo::getContents isn't working with ssh2 protocol
merged branch alquerci/ticket_8219 (PR #8243)

This PR was merged into the 2.2 branch.

Discussion
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[Finder] Fix SplFileInfo::getContents isn't working with ssh2 protocol

| Q             | A
| -------------:| ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8219
| License       | MIT

Commits
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849f3ed [Finder] Fix SplFileInfo::getContents isn't working with ssh2 protocol