Fix an NPE during startup when dump_configuration is enabled
Errors in Bootstrapper.start are logged to System.out if logging failed to initialize
Merge pull request #3638 from chrisvest/2.2-pagecache-npe

Fix an NPE during startup when dump_configuration is enabled
Merge pull request #3634 from lutovich/2.1-npe-in-bootstrapper-catch-block

Null-safe logging in Bootstrapper
Merge '2.1-maint' un 'master'

Conflicts:
	community/server/src/main/java/org/neo4j/server/Bootstrapper.java
Unknown relationship types in a dense node should not cause relationship loading
(cherry picked from commit 5116cd0)