rteval: Fix -aNone being passed to cyclictest

When rteval is called via the command line, cpulists for both
measurements and loads default to an empty string and are further
processed by parse_cpulist_from_config. However, this is not true when
rteval is used as a module: in that case, neither the default
command-line value is used nor parse_cpulist_from_config is run, leading
to None being set to the config property of measurements which is
explicitely passed down to the corresponding cyclictest config property.

After 64ce7848dfab ("rteval: Add relative cpulists for measurements"),
where the check for None was removed from the cyclictest module, rteval
passes "-aNone" to cyclictest when being used as a module.

Call parse_cpulist_from_config with an empty string to get the default
cpulist to pass to cyclictest module if cpulist is empty in
the measurement config.

Fixes: 64ce7848dfab ("rteval: Add relative cpulists for measurements")
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: John Kacur <jkacur@redhat.com>

rteval/modules/measurement/__init__.py

diff --git a/rteval/modules/measurement/__init__.py b/rteval/modules/measurement/__init__.py
index 11bd7b0..43c0fda 100644
--- a/rteval/modules/measurement/__init__.py
+++ b/rteval/modules/measurement/__init__.py
@@ -148,6 +148,9 @@
         modcfg = self.__cfg.GetSection("measurement")
         cpulist = modcfg.cpulist
         run_on_isolcpus = modcfg.run_on_isolcpus
+        if cpulist is None:
+            # Get default cpulist value
+            cpulist = cpulist_utils.collapse_cpulist(parse_cpulist_from_config("", run_on_isolcpus))
 
         for (modname, modtype) in modcfg:
             if isinstance(modtype, str) and modtype.lower() == 'module':  # Only 'module' will be supported (ds)