match error strings in command output more precisely

fixes #2845

Author: Vladimir Kotal

opengrok-tools/src/main/python/opengrok_tools/utils/commandsequence.py

@@ -30,6 +30,7 @@
     SUCCESS_EXITVAL
 )
 import json
+import re
 
 
 class CommandSequenceBase:
@@ -228,8 +229,9 @@ def check(self, ignore_errors):
                     self.logger.error(out)
             self.logger.error("")
 
+        re_program = re.compile('ERROR[:]*\\s+')
         errored_cmds = {k: v for k, v in self.outputs.items()
-                        if "error" in str(v).lower()}
+                        if re_program.match(str(v))}
         if len(errored_cmds) > 0:
             ret = 1
             self.logger.error("Command output in project '{}'"