Refactor daemon periodic check and shutdown logic

Cleaner logic and logging, improved stability during shutdown, reduced
overhead of the periodic checks, and regular calls, should also eliminate
dying daemons scenario on parallel execution (another attempt to do it).

compiler/tests/org/jetbrains/kotlin/daemon/CompilerDaemonTest.kt

@@ -335,7 +335,7 @@ class CompilerDaemonTest : KotlinIntegrationTestBase() {
 
                 logFile.assertLogContainsSequence("Some sessions are active, waiting for them to finish")
 
-                val res = daemon?.getUsedMemory()
+                val res = daemon?.leaseCompileSession(null)
 
                 assertEquals("Invalid state", CompileService.CallResult.Dying(), res)
 
@@ -343,7 +343,7 @@ class CompilerDaemonTest : KotlinIntegrationTestBase() {
 
                 Thread.sleep(100) // allow after session timed action to run
 
-                logFile.assertLogContainsSequence("All sessions finished, shutting down",
+                logFile.assertLogContainsSequence("All sessions finished",
                                                   "Shutdown started")
             }
         }