Revert "JATS template: don't include journal-meta unless 'journal'..."

This reverts commit 193b5cceba.

journal-meta is required.  Better to include it even if it
doesn't validate through lack of required fields.

data/templates/default.jats

@@ -10,7 +10,6 @@ $else$
 <article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="1.0" article-type="other">
 $endif$
 <front>
-$if(journal)$
 <journal-meta>
 $if(journal.publisher-id)$
 <journal-id journal-id-type="publisher-id">$journal.publisher-id$</journal-id>
@@ -42,7 +41,6 @@ $if(journal.publisher-loc)$
 $endif$
 </publisher>
 </journal-meta>
-$endif$
 <article-meta>
 $if(article.publisher-id)$
 <article-id pub-id-type="publisher-id">$article.publisher-id$</article-id>

test/writer.jats

@@ -3,6 +3,13 @@
                   "JATS-journalpublishing1.dtd">
 <article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="1.0" article-type="other">
 <front>
+<journal-meta>
+<journal-title-group>
+</journal-title-group>
+<publisher>
+<publisher-name></publisher-name>
+</publisher>
+</journal-meta>
 <article-meta>
 <title-group>
 <article-title>Pandoc Test Suite</article-title>