Adding tests around the backup tool.

o Tests covering the following:
  o Copying of files from store -> backup
  o Transactions that happen during copy are replayed
    onto the backup store
  o A transaction log contianing the latest transaction
    for lucene & neostore is in the backup
Merge pull request #1928 from mneedham/1.9-main-testing-backup

Adding tests around the backup tool.
Throttles debug logging for one of two problematic debug log statements.
Added better error message for offset error.
Widens recoverable failure scenarios for schema indexes

Failures while populating indexes include crashes which may leave the
 index files themselves inconsistent. That may lead to the indexes
 being unable to open and recovery on them impossible to proceed. However,
 such a scenario can be recovered by deleting and repopulating the index,
 as it's done for failures so far.
 This commit adds two more exceptions to the list of recovereable errors.
 FileNotFoundException and EOFException thrown when opening a lucene
 index, which may come up if the index is not closed properly, as in
 the case of a VM crash.
Merge pull request #2054 from jakewins/1.9-offseterr

Added better error message for offset error.
Introducing TxCountsTrackingTestSupport

o  Moving PeriodicCommitAcceptanceTest to use FunSuite
Fix LoadCsvPeriodicCommitObserver must commit if updates are greater or _equal_ the batch size
Report line number information when failing during import with USING PERIODIC COMMIT LOAD CSV ...

o Some cleanup in EPB and renamed NullDecorator to NullPipeDecorator
o Introduce LoadCsvStatusWrapException
o Made sure LoadCsvPipe uses the correct external resource for loading (the one provided by the observer)
Ensure that each PeriodicCommitLoadCsvAcceptance test only turns green by exactly one way to commit

o Previously some of these tests could get green either by onNext() or onNotify() code paths which caused confusion.
  This happened due to the number of updates and the periodic commit value used and due to onNotify() using
  a batchSize * 2 safety factor
o Add UpdateCounter
Ensure that errors from server are correct when LOAD CSV adds line number information when USING PERIODIC COMMIT
Classic StringLogger have option to log debug messages
Merge branch '1.9-maint' into 2.0-merge-in-1.9

Conflicts:
	community/kernel/src/main/java/org/neo4j/kernel/impl/util/StringLogger.java
	community/server/src/main/java/org/neo4j/server/configuration/Configurator.java
	enterprise/backup/src/main/java/org/neo4j/backup/BackupImpl.java
	enterprise/com/src/main/java/org/neo4j/com/ServerUtil.java
	enterprise/ha/src/main/java/org/neo4j/kernel/ha/cluster/DefaultMasterImplSPI.java
Fixed a test shutdown issue
Merge branch '1.9-maint' into 2.0-merge-in-1.9

Conflicts:
	enterprise/backup/src/test/java/org/neo4j/backup/BackupServiceIT.java
Merge pull request #2060 from tinwelint/2.0-merge-in-1.9

Merge 1.9 --> 2.0
Merge branch '2.0-maint' into 2.1-merge-2.0
Merge pull request #2063 from tinwelint/2.1-merge-2.0

2.1 merge 2.0
Add support for unicode dashes in rel patterns
Add support for unicode arrow heads in rel patterns