RFR: 8273910: Redundant condition and assignment in java.net.URI

[Andrey Turbanov]

1. Assignment `ru.host = child.host;` is duplicated and hence redundant.
2. Condition `q > p` is always `true`, because it just bellow inverse check

                if (q <= p)
                    break;

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Commit messages:
 - [PATCH] Cleanup redundant assignment and condition in URI

Changes: https://git.openjdk.java.net/jdk/pull/5190/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5190&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273910
  Stats: 11 lines in 1 file changed: 4 ins; 7 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5190.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5190/head:pull/5190

PR: https://git.openjdk.java.net/jdk/pull/5190