software/kvm/test: Wait long when big images are downloaded

Some tests are checking deeply that bootstrap script works correctly inside
if prepared VM, but those prepared VMs are big chunks of data to be fetched,
so it's required to wait quite long.

software/kvm/test/test.py

@@ -249,6 +249,8 @@ class TestAccessDefaultAdditional(MonitorAccessMixin, InstanceTestCase):
 class TestAccessDefaultBootstrap(MonitorAccessMixin, InstanceTestCase):
   __partition_reference__ = 'adb'
   expected_partition_with_monitor_base_url_count = 1
+  # as few gigabytes are being downloaded, wait a bit longer
+  instance_max_retry = 40
 
   @classmethod
   def getInstanceParameterDict(cls):
@@ -344,6 +346,8 @@ class TestAccessKvmClusterAdditional(MonitorAccessMixin, InstanceTestCase):
 class TestAccessKvmClusterBootstrap(MonitorAccessMixin, InstanceTestCase):
   __partition_reference__ = 'akcb'
   expected_partition_with_monitor_base_url_count = 3
+  # as few gigabytes are being downloaded, wait a bit longer
+  instance_max_retry = 40
 
   @classmethod
   def getInstanceSoftwareType(cls):