Minor. Clarified property name.

jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt

@@ -72,7 +72,7 @@ public abstract class AbstractIncrementalJpsTest : JpsBuildTestCase() {
         super.tearDown()
     }
 
-    protected open val customTest: Boolean
+    protected open val allowNoFilesWithSuffixInTestData: Boolean
         get() = false
 
     protected open val mockConstantSearch: Callbacks.ConstantAffectionResolver?
@@ -159,7 +159,7 @@ public abstract class AbstractIncrementalJpsTest : JpsBuildTestCase() {
             fail("Bad test data format: files ending with both unnumbered and numbered \".new\"/\".delete\" were found")
         }
         if (!haveFilesWithoutNumbers && !haveFilesWithNumbers) {
-            if (customTest) {
+            if (allowNoFilesWithSuffixInTestData) {
                 return listOf(listOf())
             }
             else {

jps-plugin/test/org/jetbrains/kotlin/jps/build/IncrementalCacheVersionChangedTest.kt

@@ -32,7 +32,7 @@ public class IncrementalCacheVersionChangedTest : AbstractIncrementalJpsTest() {
         doTest("jps-plugin/testData/incremental/custom/cacheVersionChangedAndFileModified/")
     }
 
-    override val customTest: Boolean
+    override val allowNoFilesWithSuffixInTestData: Boolean
         get() = true
 
     override fun performAdditionalModifications() {