Unify the way to set compiler options using System.properties

Now compiler flags with boolean values which are controlled by system
properties could be set in similar way. The following syntax is
appropriate. For setting flag:
'-DflagName,'-DflagName=[y|Y|true|TRUE|yes|YES|on|ON]'
for unsetting flag:
'-DflagName=[n|N|false|FALSE|no|NO|off|OFF]'

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalCompilerRunner.kt

@@ -26,7 +26,6 @@ import org.jetbrains.kotlin.cli.common.CompilerSystemProperties
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
-import org.jetbrains.kotlin.cli.common.toBooleanLenient
 import org.jetbrains.kotlin.compilerRunner.MessageCollectorToOutputItemsCollectorAdapter
 import org.jetbrains.kotlin.compilerRunner.OutputItemsCollectorImpl
 import org.jetbrains.kotlin.compilerRunner.SimpleOutputItem
@@ -63,7 +62,7 @@ abstract class IncrementalCompilerRunner<
     protected open val kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS
 
     //TODO(valtman) temporal measure to ensure quick disable, should be deleted after successful release
-    protected val withSnapshot: Boolean = CompilerSystemProperties.COMPILE_INCREMENTAL_WITH_CLASSPATH_SHAPSHOTS.value.toBooleanLenient() ?: false
+    protected val withSnapshot: Boolean = CompilerSystemProperties.COMPILE_INCREMENTAL_WITH_CLASSPATH_SHAPSHOTS.toBooleanLenient()
 
     protected abstract fun isICEnabled(): Boolean
     protected abstract fun createCacheManager(args: Args, projectDir: File?): CacheManager
@@ -151,8 +150,8 @@ abstract class IncrementalCompilerRunner<
                                 messageCollector,
                                 withSnapshot,
                                 abiSnapshot,
-                                classpathAbiSnapshot
-                            )
+                                classpathAbiSnapshot)
+
                         } else {
                             rebuild(BuildAttribute.NO_ABI_SNAPSHOT)
                         }