Various improvements related to stack trace logging and exception display

[rainboyan]

• ErrorsViewStackTracePrinter should use grailsResourceLocator first
• And grailsResourceLocator need to set searchLocation to BuildSettings.BASE_DIR
• Display the relative path of the file associated with the errors
• Auto-configure StackTraceFilterer bean on GrailsExceptionResolver
• Improve the log messages of exception's stack trace
• Fixed StackTracePrinterSpec
• Add an additional Spring configuration metadata: grails.full.stacktrace
• Formatting request parameters and log information, the excluded parameters will be marked [FILTERED] in the log