RFR: 6986: "Flight Recorder" is not working as expected for localhost Connection

[Guru Hb]

RC : "Unlock Commercial Feature " Dialog was promoted while Using : Oracle JDK 11.0.x + Local rmi connection (Not for OpenJDK 11 or above). 
Solution : Check if the target JVM is Oracle JDK and its version is greater than or equal to 11.

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Commit messages:
 - Removed redundent imports
 - "Flight Recorder" is not working as expected for localhost Connection

Changes: https://git.openjdk.java.net/jmc/pull/181/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=181&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6986
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/181.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/181/head:pull/181

PR: https://git.openjdk.java.net/jmc/pull/181