Fixed #553 Migration tool form 3.x to 4.x should ignore multi line field that are not M2Doc statements.

Author: ylussaud

plugins/org.obeonetwork.m2doc/src/org/obeonetwork/m2doc/migrator/M2Doc4Migrator.java

@@ -96,7 +96,7 @@ protected List<TemplateValidationMessage> migrateParagraph(XWPFParagraph paragra
             }
         }
 
-        if (inField) {
+        if (inField && isM2DocInstruction) {
             final XWPFRun lastParagraphRun = paragraph.getRuns().get(paragraph.getRuns().size() - 1);
             result.add(new TemplateValidationMessage(ValidationMessageLevel.ERROR, "Multi paragraph field detected.",
                     lastParagraphRun));

tests/org.obeonetwork.m2doc.tests/resources-migration/version_3/query/nominalMultiLineField/nominalMultiLineField-messages-expected.txt

@@ -0,0 +1 @@
+ERROR - Multi paragraph field detected.