Input framework unit test adjustments.

- Generally increased the time allowed before they timeout.

- For tests w/ a clear termination condition (most of them), made
  timeouts result in a test failure.

- Seemed to be a race in some cases between tests generating output and
  the input reader stream getting removed/closed, so moved stream removal
  closer to termination time, when all output should be available.

testing/btest/scripts/base/frameworks/input/invalidtext.bro

@@ -1,5 +1,5 @@
 # @TEST-EXEC: btest-bg-run bro bro -b %INPUT
-# @TEST-EXEC: btest-bg-wait -k 5
+# @TEST-EXEC: btest-bg-wait 10
 # @TEST-EXEC: btest-diff out
 # @TEST-EXEC: sed 1d .stderr > .stderrwithoutfirstline
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff .stderrwithoutfirstline
@@ -33,11 +33,11 @@ event bro_init()
 	outfile = open("../out");
 	# first read in the old stuff into the table...
 	Input::add_table([$source="../input.log", $name="ssh", $idx=Idx, $val=Val, $destination=servers]);
-	Input::remove("ssh");
 	}
 
 event Input::end_of_data(name: string, source:string)
 	{
 	print outfile, servers;
+	Input::remove("ssh");
 	terminate();
 	}