Updated table layouts for procedures, some general docs clean up

* fixes 1627: support both, a single command or a list of commands for apoc.systemdb.execute

* don't commit once tx has failed

* #1608: improve apoc.ttl to enable deletion of more than 1000 nodes at once

* changes review

* removed unused import, format

* changed deprecated by, description and moved TTLTest from apoc.date to apoc.ttl

* removed unused import DateExpiry

* reset default limit 1000

* changed test and query delete with periodic.iterate

* removed import

* removed whitespaces

* changes review - added param batchsize

* splitted periodic iterate, fixed log.info() and added rels to test

* changed log handling

* changes TTLTest

* removed comment

* white-space

* added apoc.ttl.batchsize.dbname config

* code clean

* added procedure in date/TTLTest.java

* updated ttl adoc

* removed limit in periodic iterate - queries with id(n)

that could cause IndexOutOfBoundExceptions for some values of numberOfNodes over 46341

* Deprecate vPattern procs and replace with virtualPath proc

* Clean up commented out vPattern

These changes address [Issue #1762](https://github.com/neo4j-contrib/neo4j-apoc-procedures/issues/1762), which is about two broken links on the APOC import CSV format.

* fixes #1630: apoc.load.csv doesn't support basic auth

* code clean

* code clean

* changed tests

* changed tests LoadJson - LoadCsv