sanitycheck: raise exceptions on bad test names

Raise exception on bad test names such as 'test' or 'sample'.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

scripts/sanity_chk/sanitylib.py

diff --git a/scripts/sanity_chk/sanitylib.py b/scripts/sanity_chk/sanitylib.py
index f042f20..6c8d512 100644
--- a/scripts/sanity_chk/sanitylib.py
+++ b/scripts/sanity_chk/sanitylib.py
@@ -1336,6 +1336,12 @@
 
         # workdir can be "."
         unique = os.path.normpath(os.path.join(relative_tc_root, workdir, name))
+        check = name.split(".")
+        if len(check) < 2:
+            raise SanityCheckException(f"""bad test name '{name}' in {testcase_root}/{workdir}. \
+Tests should reference the category and subsystem with a dot as a separator.
+                    """
+                    )
         return unique
 
     @staticmethod

scripts/sanitycheck

diff --git a/scripts/sanitycheck b/scripts/sanitycheck
index 8f765a0..7b2736a 100755
--- a/scripts/sanitycheck
+++ b/scripts/sanitycheck
@@ -239,7 +239,7 @@
                 }
                 cw.writerow(rowdict)
             else:
-                logger.info("{} can't be exported".format(test))
+                logger.error("{} can't be exported: ".format(test))
 
 
 def parse_arguments():