backport of commit in 3.2

Raft message log line rewrite to aid machine readability.

Log raft election vote decision

Backport: Removed unnecessary assertion in UNION

Fixed bug in shortestPath with predicate depending on multiple patterns

Make the error message for missing a colon in the relationship type more helpful

Include date, both to and from members, type of message rather than class of message, arranged as space separated fields and with message quoted.

Handle null values in parameter list for rule planner

Allow to use NIOFSDirectory as directory implementations for lucene indexes

Updated version 3.0.11 to 3.0.12

Fix dedup regex pattern

Clarified the usage of Object in procedures

Don't delete known_host

Now identical with old error message

This is no longer necessary.

This will fix neo4j/neo4j-java-driver#416

If the predicate had dependencies on path variables from both shortestPath
patterns, then we were applying the predicate to both, even it is was only
associated with the one. This is fixed by using the same `hasDependenciesMet`
function used for normal pattern-predicate association.

The rule planner didn't handle null values in a parameter map when
setting properties.

Fixes #3870

Better error message when not is parsed as a function.

Fixing error message of ORDER BY with null values

Fixes #2556

Backport of PR#9730

Fix shortest path in with clause bug

changelog: Fixes #9571 where a NullPointerException was thrown
when using ORDER BY with null values. Now we give a more comprehensive
error message.

Semantic check claimed shortest path returned a list
Unwind didn't work for the Scala iterator returned by allShortestPaths

Add "default_directory_factory" feature toggle in DirectoryFactory
to be able to choose between default directory factory and NIOFSDirectory
for lucene indexes directory.

Close AbstractTraverserIterator resource only once

ensure temporary files go into the workspace, not /tmp. this is because we might run out of disk space when root volume is small, and to reduce contention