RFR: 8285452: Support new API to replace a file content using FileUtils.java

[Sibabrata Sahoo]

A new API to support replacing selective lines with desired content.

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Commit messages:
 - 8285452: Support new API to replace a file content using FileUtils.java
 - Revert "8285452: Support new API to replace a file content in FileUtils.java"
 - 8285452: Support new API to replace a file content in FileUtils.java

Changes: https://git.openjdk.java.net/jdk/pull/8360/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8360&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285452
  Stats: 15 lines in 1 file changed: 15 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8360.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8360/head:pull/8360

PR: https://git.openjdk.java.net/jdk/pull/8360