ACCUMULO-3049 Add authenticate to AuditedSecurityOperation

When a client authenticates with Accumulo, the information
is presently not included in the audit log. We should definitely
know when a client is authenticating against the system.
ACCUMULO-3050 Include client IP from thrift processor in audit msg
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-3052 Allow configuration of SSL cipher suites
Merge branch '1.6.1-SNAPSHOT'