server-mode: Always try to read CMakeCache, even after error

Change-Id: Ib3d4fb5ac14340a7f706e4a1d8a0cbdc420d01d1
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/plugins/cmakeprojectmanager/servermodereader.h

@@ -68,6 +68,8 @@ private:
     void handleProgress(int min, int cur, int max, const QString &inReplyTo);
     void handleSignal(const QString &signal, const QVariantMap &data);
 
+    void reportError();
+
     int calculateProgress(const int minRange, const int min,
                           const int cur,
                           const int max, const int maxRange);
@@ -166,6 +168,8 @@ private:
     int m_progressStepMinimum = 0;
     int m_progressStepMaximum = 1000;
 
+    QString m_delayedErrorMessage;
+
     CMakeConfig m_cmakeConfiguration;
 
     QSet<Utils::FileName> m_cmakeFiles;