Refactor daemon parallel start test to improve diagnostics

also add daemon info to the RPC
and remove redundant daemon stopping calls, that should speed up
tests execution

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

@@ -77,6 +77,9 @@ interface CompileService : Remote {
     @Throws(RemoteException::class)
     fun getDaemonOptions(): CallResult<DaemonOptions>
 
+    @Throws(RemoteException::class)
+    fun getDaemonInfo(): CallResult<String>
+
     @Throws(RemoteException::class)
     fun getDaemonJVMOptions(): CallResult<DaemonJVMOptions>
 

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

@@ -206,6 +206,10 @@ class CompileServiceImpl(
 
     // RMI-exposed API
 
+    override fun getDaemonInfo(): CompileService.CallResult<String> = ifAlive(minAliveness = Aliveness.Dying) {
+        CompileService.CallResult.Good("Kotlin daemon on port $port")
+    }
+
     override fun getDaemonOptions(): CompileService.CallResult<DaemonOptions> = ifAlive {
         CompileService.CallResult.Good(daemonOptions)
     }