don't use GPG_AGENT_INFO to force batch mode in test suite

Fails with gpg 2. Instead, use a different environment variable.

The clean fix would instead be to add an annex.gpg-options configuration.
But, that would be rather a lot of work and it's unlikely it would be
useful for much else.

Utility/Gpg.hs

@@ -23,9 +23,13 @@ newtype KeyIds = KeyIds [String]
 stdParams :: [CommandParam] -> IO [String]
 stdParams params = do
 	-- Enable batch mode if GPG_AGENT_INFO is set, to avoid extraneous
-	-- gpg output about password prompts.
+	-- gpg output about password prompts. GPG_BATCH is set by the test
+	-- suite for a similar reason.
 	e <- getEnv "GPG_AGENT_INFO"
-	let batch = if isNothing e then [] else ["--batch", "--no-tty"]
+	b <- getEnv "GPG_BATCH"
+	let batch = if isNothing e && isNothing b
+		then []
+		else ["--batch", "--no-tty"]
 	return $ batch ++ defaults ++ toCommand params
 	where
 		-- be quiet, even about checking the trustdb

test.hs

@@ -664,7 +664,7 @@ test_bup_remote = "git-annex bup remote" ~: intmpclonerepo $ when Build.SysConfi
 test_crypto :: Test
 test_crypto = "git-annex crypto" ~: intmpclonerepo $ when Build.SysConfig.gpg $ do
 	-- force gpg into batch mode for the tests
-	setEnv "GPG_AGENT_INFO" "/dev/null" True
+	setEnv "GPG_BATCH" "1" True
 	Utility.Gpg.testTestHarness @? "test harness self-test failed"
 	Utility.Gpg.testHarness $ do
 		createDirectory "dir"