JPS, tests, minor: reformat test data for changeIncrementalOption/incrementalOff

jps-plugin/testData/incremental/changeIncrementalOption/incrementalOff/_steps.txt

@@ -0,0 +1,2 @@
+change module2 and disable incremental compilation
+change module2 again

jps-plugin/testData/incremental/changeIncrementalOption/incrementalOff/build.log

@@ -1,4 +1,4 @@
-================ Step #1 =================
+================ Step #1 change module2 and disable incremental compilation =================
 
 Lookups cache are SHOULD_BE_CLEARED: actual=(3011001, [jvm]) -> expected=null
 Local cache for Module 'module1' production are SHOULD_BE_CLEARED: actual=CacheVersion(version=9011001) -> expected=null
@@ -33,7 +33,7 @@ Building module4
 Exit code: NOTHING_DONE
 ------------------------------------------
 
-================ Step #2 =================
+================ Step #2 change module2 again =================
 
 Building module1
 Exit code: NOTHING_DONE