FIX: Propagate exit code to the caller

The exit code of the recursive script call was simply swallowed.
javadoc cleanup for RequestContext
[NEXUS-6545] set the full path for request.log when rolling
Upgrade to logback 1.1.2 (minor bug fixes)
Set nexus.log rolling maxHistory to 90 (same as request.log)
[NX-223] Repository / Routing
Guard against WrapperManager.getUser(false) returning null, and log a warning
Merge pull request #486 from georgy/javadocs

javadoc cleanup for RequestContext
[NEXUS-6549] .* is too greedy, change first match group to use [^/]* instead
Change javadoc for REQUEST_AGENT. Old one seems to be a copy paster from REQUEST_USER
[NEXUS-6555] Add support to override any existing configured bootstrap property from System.properties
[NEXUS-6555] System.properties overrides any other properties
Merge pull request #488 from georgy/accept-header

Fixing javadoc of REQUEST_AGENT
Merge pull request #360 from hschildberg/master

FIX: Propagate exit code to the caller
[NEXUS-6316] upgrade to shiro 1.2.3
[NX-404] Set X-Nexus-UI header for ajax requests so analytics can tell what requests come from the UI
[NX-413] Remove usage of state cookie provider
[NX-223] Remove useless check / Fix typo
Merge pull request #492 from sonatype/NX-223-repo-routing-ui

REVIEW: [NX-223] Repository / Routing NG UI
mvn license:format
Merge pull request #495 from sonatype/NX-413-remove-state-cookie-provider

REVIEW: [NX-413] Remove usage of state cookie provider
Merge pull request #494 from sonatype/NX-404-add-x-nexus-ui-header

TRIVIAL: [NX-404] Set X-Nexus-UI header for ajax requests