Bump jni from 0.15.0 to 0.17.0 in /exonum-java-binding/core/rust

Bumps [jni](https://github.com/jni-rs/jni-rs) from 0.15.0 to 0.17.0.
- [Release notes](https://github.com/jni-rs/jni-rs/releases)
- [Changelog](https://github.com/jni-rs/jni-rs/blob/master/CHANGELOG.md)
- [Commits](jni-rs/jni-rs@v0.15.0...v0.17.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

exonum-java-binding/core/rust/Cargo.lock

@@ -27,7 +27,7 @@ exonum-supervisor = "1.0.0"
 exonum-testkit = "1.0.0"
 exonum-time = "1.0.0"
 futures = "0.1"
-jni = { version = "0.15", features = ["invocation"] }
+jni = { version = "0.17", features = ["invocation"] }
 lazy_static = "1.3"
 log = "0.4"
 parking_lot = "0.10"