writerfilter: use WW8 name for StyleId

The sStyleIdentifierD for the default style is "Normal".
FindStyleSheetByISTD uses sStyleIndentifierD for its comparison.
SetCurrentParaStyleId() is used to save the WW8 provided name.
Thus, the default style should do the same.

The SetCurrentParaStyleId was added here by
commit 4abb20ee162ff874cc143fd952f72d30ddc9d136
Author: Miklos Vajna
Date:   Tue Jun 19 17:36:28 2012 +0200

Also removing the static variable, since it serves no purpose.

Change-Id: I58659e9d809c32dd799fb46217971707991b2803
Reviewed-on: https://gerrit.libreoffice.org/48034
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
diff --git a/writerfilter/source/dmapper/DomainMapper.cxx b/writerfilter/source/dmapper/DomainMapper.cxx
index 32945c9..35693db 100644
--- a/writerfilter/source/dmapper/DomainMapper.cxx
+++ b/writerfilter/source/dmapper/DomainMapper.cxx
@@ -2998,13 +2998,12 @@ void DomainMapper::lcl_startParagraphGroup()
    if (!(m_pImpl->GetTopContextOfType(CONTEXT_PARAGRAPH) == m_pImpl->GetTopContext()))
        m_pImpl->PushProperties(CONTEXT_PARAGRAPH);

    static const char sDefault[] = "Standard";
    if (m_pImpl->GetTopContext())
    {
        if (!m_pImpl->IsInShape())
        {
            m_pImpl->GetTopContext()->Insert( PROP_PARA_STYLE_NAME, uno::makeAny( OUString(sDefault) ) );
            m_pImpl->SetCurrentParaStyleId(sDefault);
            m_pImpl->GetTopContext()->Insert( PROP_PARA_STYLE_NAME, uno::makeAny( OUString("Standard") ) ); //ConvertedStyleName
            m_pImpl->SetCurrentParaStyleId("Normal"); //WW8 name
        }
        if (m_pImpl->isBreakDeferred(PAGE_BREAK))
            m_pImpl->GetTopContext()->Insert(PROP_BREAK_TYPE, uno::makeAny(style::BreakType_PAGE_BEFORE));