qa/tasks/ceph.py: introduce crimson_compat

In an attempt to use the default flavor for both crimson and classic,
we can no longer rely on flavors to enable crimson flags.
The existing CRIMSON_COMPAT env variable is defined under "workunit",
and is not supported by tasks/ceph. Instead, introduce, a dedicated
crimson_compat option supported by tasks/ceph.

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

qa/config/crimson_qa_overrides.yaml

@@ -12,6 +12,7 @@ overrides:
         debug ms: 20
         seastore cachepin size pershard: 64M
         seastore max concurrent transactions: 8
+    crimson_compat: true
   workunit:
     env:
       CRIMSON_COMPAT: '1'

qa/tasks/ceph.py

@@ -667,9 +667,7 @@ def create_simple_monmap(ctx, remote, conf, mons,
 
 
 def is_crimson(config):
-    return config.get('flavor', 'default') == 'crimson-debug' or \
-        config.get('flavor', 'default') == 'crimson-release'
-
+    return config.get('crimson_compat', False)
 
 def maybe_redirect_stderr(config, type_, args, log_path):
     if type_ == 'osd' and is_crimson(config):