CMake: Make all readers use isReadyNow() signal

The tealeafreader used to not ever use this signal and used
the isReady() method to short-circuit the whole mechanism.

Change-Id: I2f7caedeedf977c70a5d7807e3a92775757a6fef
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/servermodereader.cpp

@@ -101,7 +101,7 @@ void ServerModeReader::setParameters(const BuildDirParameters &p)
     CMakeTool *cmake = p.cmakeTool();
     QTC_ASSERT(cmake, return);
 
-    BuildDirReader::setParameters(p);
+    m_parameters = p;
     if (!m_cmakeServer) {
         m_cmakeServer.reset(new ServerMode(p.environment,
                                            p.sourceDirectory, p.workDirectory,
@@ -213,11 +213,6 @@ void ServerModeReader::stop()
     m_parser.flush();
 }
 
-bool ServerModeReader::isReady() const
-{
-    return m_cmakeServer->isConnected();
-}
-
 bool ServerModeReader::isParsing() const
 {
     return static_cast<bool>(m_future);