[LyX/master] Cmake tests: Amend 667c0647: Use jing to test only docbook5 exports

[Kornel Benko]

commit b6c5603ab0cd5f1aaf78bca88d324b58077bc300
Author: Kornel Benko <kornel at lyx.org>
Date:   Tue Oct 13 15:42:29 2020 +0200

    Cmake tests: Amend 667c0647: Use jing to test only docbook5 exports
---
 development/autotests/export.cmake |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/development/autotests/export.cmake b/development/autotests/export.cmake
index d25362e..384f389 100755
--- a/development/autotests/export.cmake
+++ b/development/autotests/export.cmake
@@ -280,7 +280,7 @@ else()
             endif()
           endif()
         endif()
-        if (NOT _err AND JAVA_EXECUTABLE)
+        if (NOT _err AND format MATCHES "docbook5" AND JAVA_EXECUTABLE)
           # check with jing
           message(STATUS "Calling: ${JAVA_EXECUTABLE} -jar \"${TOP_SRC_DIR}/development/tools/jing.jar\" https://docbook.org/xml/5.2b09/rng/docbook.rng \"${WORKDIR}/${result_file_name}\"")
           execute_process(