Implementation of the "ManagementAgent.status" indirectly depends on the size 
of "O_BUFLEN".

The root cause is usage of 
[print_cr()](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/utilities/ostream.cpp#L153)
 which may 
[truncate](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/utilities/ostream.cpp#L101)
 the output.

The solution is similar to the 
[JDK-8263640](https://bugs.openjdk.org/browse/JDK-8263640). see discussion 
about that approach https://github.com/openjdk/jdk/pull/4616

-------------

Commit messages:
 - 8303102: jcmd: ManagementAgent.status truncates the text longer than O_BUFLEN

Changes: https://git.openjdk.org/jdk/pull/12724/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12724&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303102
  Stats: 3 lines in 2 files changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/12724.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12724/head:pull/12724

PR: https://git.openjdk.org/jdk/pull/12724

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