decommissioned ReconfigureOnChangeFilter and replaced it with  ReconfigureOnChangeTask, added ScheduledExecutorService to Context

It was a mistake to use original httpRequest as long as it is available because web containers may recycle it and populate with the fields from another request. So make sure that when prepareForDeferredProcessing() is called, we will be only using copied data.

Make AccessEvent.prepareForDeferredProcessing() to create a copy of the request attributes map so attributes are available later even if processing is done in a background thread.

Only Serializable attributes are copied to be on a safe side. Also, do not copy attributes set by Logback's TeeFilter as the very same information is already serialised as request/response content.

Make sure TeeHttpServletResponse uses the response character encoding
when contructing a new writer.

Make prepareForDeferredProcessing on AccessEvent idempotent, otherwise the OutputStreamAppender overwrites valid properties with now invalid properties when using an async appender

Add suggested git attributes and associated files that were not in sync
already with expected line endings.

logback-access & logback-examples resource files moved from source
packages to resources packages to comply with maven standards.

- Corrected maven xsd
- Removed duplication in child poms (url, license, version, groupId)
- Removed commented out scala items
- Removed commented out jetty servlet api
- Removed excess spacing
- Note JavaSE-1.6 & 1.6 oracle docs
- Replaced examples use of antrun with maven-dependency-plugin
- Updated plugin versions
- Added plugins in parent pluginManagement
- Updated mockito & log4j
- Dropped old slf4j-api 1.5.10 - pom pulls latest
- Moved modelVersion to correct location
- Explicit groupId everywhere
- Use maven properties for jdk version used for compiler plugin
- Added generation of test source & javadoc jars
- Added lifecycle mapping filter for gmaven for users without m2e configuration.
- Moved maven bundle to plugin management

This reverts commit 495929dc.

parent.relativePath was being set to the default value unnecessarily.