Fix eunit tests to "start" compiler and syntax_tools

This is just silly busy-work since they're library applications, but
whatever.

src/lager_console_backend.erl

@@ -128,6 +128,8 @@ console_log_test_() ->
                 application:load(lager),
                 application:set_env(lager, handlers, []),
                 application:set_env(lager, error_logger_redirect, false),
+                application:start(compiler),
+                application:start(syntax_tools),
                 application:start(lager)
         end,
         fun(_) ->

src/lager_crash_log.erl

@@ -240,6 +240,8 @@ filesystem_test_() ->
                 application:set_env(lager, handlers, [{lager_test_backend, info}]),
                 application:set_env(lager, error_logger_redirect, true),
                 application:unset_env(lager, crash_log),
+                application:start(compiler),
+                application:start(syntax_tools),
                 application:start(lager),
                 timer:sleep(100),
                 lager_test_backend:flush()

src/lager_file_backend.erl

@@ -234,6 +234,8 @@ filesystem_test_() ->
                 application:load(lager),
                 application:set_env(lager, handlers, [{lager_test_backend, info}]),
                 application:set_env(lager, error_logger_redirect, false),
+                application:start(compiler),
+                application:start(syntax_tools),
                 application:start(lager)
         end,
         fun(_) ->

src/lager_handler_watcher.erl

@@ -106,6 +106,8 @@ reinstall_on_initial_failure_test_() ->
                     application:set_env(lager, handlers, [{lager_test_backend, info}, {lager_crash_backend, [from_now(2), undefined]}]),
                     application:set_env(lager, error_logger_redirect, false),
                     application:unset_env(lager, crash_log),
+                    application:start(compiler),
+                    application:start(syntax_tools),
                     application:start(lager),
                     try
                       ?assertEqual(1, lager_test_backend:count()),
@@ -132,6 +134,8 @@ reinstall_on_runtime_failure_test_() ->
                     application:set_env(lager, handlers, [{lager_test_backend, info}, {lager_crash_backend, [undefined, from_now(5)]}]),
                     application:set_env(lager, error_logger_redirect, false),
                     application:unset_env(lager, crash_log),
+                    application:start(compiler),
+                    application:start(syntax_tools),
                     application:start(lager),
                     try
                         ?assertEqual(0, lager_test_backend:count()),

test/lager_test_backend.erl

@@ -225,6 +225,8 @@ setup() ->
     application:load(lager),
     application:set_env(lager, handlers, [{?MODULE, info}]),
     application:set_env(lager, error_logger_redirect, false),
+    application:start(compiler),
+    application:start(syntax_tools),
     application:start(lager),
     gen_event:call(lager_event, ?MODULE, flush).
 
@@ -246,6 +248,8 @@ error_logger_redirect_crash_test_() ->
                 application:load(lager),
                 application:set_env(lager, error_logger_redirect, true),
                 application:set_env(lager, handlers, [{?MODULE, error}]),
+                application:start(compiler),
+                application:start(syntax_tools),
                 application:start(lager),
                 crash:start()
         end,