Added debug logs to debug checkACL NPE issue

Added few verbose logging around Request creation and checkACL code.

Release 3.6.3-8 with znode group acl super user use cases fixes

What's Changed

• Several minor fixes for znode group acl feature by @mgao0 in #66
• Allow super user to set acl by @mgao0 in #67

Full Changelog: 3.6.3-7...3.6.3-8

Release 3.6.3-7 Adding X509ZNodeGroupAclProvider support in NettyServerCnxnFactory.

Adding X509ZNodeGroupAclProvider support in NettyServerCnxnFactory.

Release 3.6.3-5 with Updated ZNode Group ACL feature

Create X509AuthenticationConfig (#64)

This commit creates a X509AuthenticationConfig class as a central place for all the (except zookeeper.X509AuthenticationProvider.superUser to minimize changes on upstream zookeeper code) x509 authentication related config properties, including (1)keys (2)setters (3)getters for those properties. X509AuthenticationConfig enables reading configs from 1) the zoo.cfg file (by way of QuorumPeerConfig) and 2) JVM argument (System Properties) for backward-compatibility.

Release 3.6.3-2 with ZNode Group ACL feature

Release 3.6.3-2 with ZNode Group ACL feature
Last commit: Add optional connection filtering feature #63

Release 3.6.3-1 off upstream 3.6.3 with linkedin/zookeeper features

Release 3.6.3-1 off upstream 3.6.3 with linkedin/zookeeper features

Release 3.6.2.4-1 with SAN-based auth improvements allowing specification of Matcher.group() index

Release 3.6.2.4-1 with SAN-based auth improvements allowing specification of Matcher.group() index

Release 3.6.2.4 with custom auth using SAN in X509 cert

Release 3.6.2.4 with custom auth using SAN in X509 cert

Release 3.6.2.3-2 with namespaced statusDir and tmpDir for ZooSave

Release 3.6.2.3-2 with namespaced statusDir and tmpDir for ZooSave

Release 3.6.2.3 with ZooSave & ZooRestore Spot Restoration (snapshot compression compatible)

Release 3.6.2.3 with ZooSave & ZooRestore Spot Restoration (snapshot compression compatible)