Add retries to login_CryptohomeTelemetry

This test fails sporadically, and is resulting in lost CQ runs. Only the
control file needs to be modified for this, the test itself already
throws a retryable exception.

BUG=chromium:338579
TEST=None

Change-Id: I0f763239a19da063146cb87f1619c052c777a4f5
Reviewed-on: https://chromium-review.googlesource.com/184016
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
diff --git a/client/site_tests/login_CryptohomeTelemetry/control b/client/site_tests/login_CryptohomeTelemetry/control
index 1a17314..1146883 100644
--- a/client/site_tests/login_CryptohomeTelemetry/control
+++ b/client/site_tests/login_CryptohomeTelemetry/control
@@ -13,6 +13,7 @@
 TEST_CATEGORY = "Functional"
 TEST_CLASS = "login"
 TEST_TYPE = "client"
+RETRIES = 3
 # TODO(achuith): Remove login_CryptohomeMounted and login_CryptohomeUnmounted
 # tests.