Migrate compiler, idea and others to new case conversion api

compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/ClientUtils.kt

@@ -107,7 +107,7 @@ private inline fun tryConnectToDaemon(port: Int, report: (DaemonReportCategory,
 private const val validFlagFileKeywordChars = "abcdefghijklmnopqrstuvwxyz0123456789-_"
 
 fun makeAutodeletingFlagFile(keyword: String = "compiler-client", baseDir: File? = null): File {
-    val prefix = "kotlin-${keyword.filter { validFlagFileKeywordChars.contains(it.toLowerCase()) }}-"
+    val prefix = "kotlin-${keyword.filter { validFlagFileKeywordChars.contains(it.lowercaseChar()) }}-"
     val flagFile = if (baseDir?.isDirectory == true)
         Files.createTempFile(baseDir.toPath(), prefix, "-is-running").toFile()
     else

compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/DaemonParams.kt

@@ -352,7 +352,7 @@ private val humanizedMemorySizeRegex = "(\\d+)([kmg]?)".toRegex()
 
 private fun String.memToBytes(): Long? =
         humanizedMemorySizeRegex
-            .matchEntire(this.trim().toLowerCase())
+            .matchEntire(this.trim().lowercase())
             ?.groups?.let { match ->
                 match[1]?.value?.let {
                     it.toLong() *

compiler/daemon/src/org/jetbrains/kotlin/daemon/LazyClasspathWatcher.kt

@@ -114,7 +114,7 @@ class LazyClasspathWatcher(classpath: Iterable<String>,
 }
 
 
-fun isClasspathFile(file: File): Boolean = file.isFile && listOf("class", "jar").contains(file.extension.toLowerCase())
+fun isClasspathFile(file: File): Boolean = file.isFile && listOf("class", "jar").contains(file.extension.lowercase())
 
 fun File.md5Digest(): ByteArray {
     val md = MessageDigest.getInstance(CLASSPATH_FILE_ID_DIGEST)