Bumps org.jgroups:jgroups from 5.5.3.Final to 5.5.4.Final.

• 4f68753 Fixed release.sh
• 970a56b Changed version from $CURRENT_VERSION to $RELEASE_VERSION
• 66c4759 - Moving fields and accessors from TP -> TPConfig (...
• 065a3b5 - Close must not set graceful_close ()
• 6f48948 Merge pull request from rhusar/JGRP-2993
• ca3b8e1 JGRP-2993 The jgroups-<version>.xsd schema file is not generated during the M...
• 72f4687 Merge pull request from rhusar/fix-javadoc-verify-suspect2
• 727e787 Fix invalid Javadoc tag in VERIFY_SUSPECT2.addSuspects()
• 5374415 Merge pull request from belaban/dependabot/maven/org.apache.maven.plugi...
• b1cea4a Bump org.apache.maven.plugins:maven-resources-plugin from 3.4.0 to 3.5.0
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