QuantumESPRESSO: Let internal EasyBlock not create a log file

This fixes the increased memory usage when running the EasyConfig test suite
as log files would stay open.

Signed-off-by: Jan André Reuter <j.reuter@fz-juelich.de>

easybuild/easyblocks/q/quantumespresso.py

@@ -28,6 +28,7 @@
 @author: Kenneth Hoste (Ghent University)
 @author: Ake Sandgren (HPC2N, Umea University)
 @author: Davide Grassano (CECAM, EPFL)
+@author: Jan Reuter (Juelich Supercomputing Centre)
 """
 
 import fileinput
@@ -84,6 +85,8 @@ def __init__(self, ec, *args, **kwargs):
 
         # Required to avoid CMakeMake default extra_opts to override the ConfigMake ones
         new_ec = EasyConfig(ec.path, extra_options=eb.extra_options())
+        # Disable log file for nested EasyBlock
+        kwargs['logfile'] = self.logfile
         self.ebclass = eb(new_ec, *args, **kwargs)
 
     class EB_QuantumESPRESSOcmake(CMakeMake):