Host: rename main_sr to main_sr_uuid

Other methods to get SRs return `SR` objects, this was inconsistent.

Signed-off-by: Yann Dirson <[email protected]>

Author: ydirson

conftest.py

@@ -314,7 +314,7 @@ def imported_vm(host, vm_ref):
         name = vm_orig.name()
         logging.info(">> Reuse VM %s (%s) on host %s" % (vm_ref, name, host))
     else:
-        vm_orig = host.import_vm(vm_ref, host.main_sr(), use_cache=CACHE_IMPORTED_VM)
+        vm_orig = host.import_vm(vm_ref, host.main_sr_uuid(), use_cache=CACHE_IMPORTED_VM)
 
     if CACHE_IMPORTED_VM:
         # Clone the VM before running tests, so that the original VM remains untouched

lib/host.py

@@ -460,7 +460,7 @@ def local_vm_srs(self):
                 srs.append(sr)
         return srs
 
-    def main_sr(self):
+    def main_sr_uuid(self):
         """ Main SR is either the default SR, or the first local SR, depending on data.py's DEFAULT_SR. """
         try:
             from data import DEFAULT_SR