IDML and OpenXML filters: the maxAttributeSize custom parameter is not used for configuring the XML input factory

net.sf.okapi.common.filters.FilterConfigurationMapper#createFilter reloads custom filter parameters but the maxAttributeSize is not used for the XML input factory configuration. Thus, the following error may occur if the maximum attribute size exceeds the default limit (4194304):

Caused by: javax.xml.stream.XMLStreamException: Maximum attribute size limit (4194304) exceeded
    at com.ctc.wstx.sr.StreamScanner.constructLimitViolation(StreamScanner.java:2479)
    at com.ctc.wstx.sr.StreamScanner.verifyLimit(StreamScanner.java:2472)
    at com.ctc.wstx.sr.BasicStreamReader._checkAttributeLimit(BasicStreamReader.java:2058)
    at com.ctc.wstx.sr.BasicStreamReader.parseAttrValue(BasicStreamReader.java:2038)
    at com.ctc.wstx.sr.BasicStreamReader.handleNsAttrs(BasicStreamReader.java:3153)
    at com.ctc.wstx.sr.BasicStreamReader.handleStartElem(BasicStreamReader.java:3050)
    at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2928)
    at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1122)
    at com.ctc.wstx.evt.WstxEventReader.nextEvent(WstxEventReader.java:283)
    at net.sf.okapi.filters.openxml.PrioritisedXMLEventReader.nextEvent(PrioritisedXMLEventReader.java:57)
    at net.sf.okapi.filters.openxml.SkippableElements$Default.skip(SkippableElements.java:131)
    at net.sf.okapi.filters.openxml.SkippableElements$Inline.skip(SkippableElements.java:168)
    at net.sf.okapi.filters.openxml.RunSkippableElements.skip(RunSkippableElements.java:76)
    at net.sf.okapi.filters.openxml.RunParser.parseSkippableElements(RunParser.java:430)
    at net.sf.okapi.filters.openxml.RunParser.startRunParsing(RunParser.java:197)
    at net.sf.okapi.filters.openxml.RunParser.parse(RunParser.java:166)
    at net.sf.okapi.filters.openxml.BlockParser.processRun(BlockParser.java:321)
    at net.sf.okapi.filters.openxml.BlockParser.parse(BlockParser.java:239)
    at net.sf.okapi.filters.openxml.StyledTextPart.process(StyledTextPart.java:278)
    at net.sf.okapi.filters.openxml.StyledTextPart.open(StyledTextPart.java:234)
    at net.sf.okapi.filters.openxml.StyledTextPart.open(StyledTextPart.java:128)
    at net.sf.okapi.filters.openxml.OpenXMLFilter.nextInDocument(OpenXMLFilter.java:447)
    at net.sf.okapi.filters.openxml.OpenXMLFilter.next(OpenXMLFilter.java:254)

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