Bazel: Fix testonly values in BUILD and .bzl files

According to the documentation [1], the expected values for testonly
are True and False. Replace all the current usages of "1" with "True".

[1] https://docs.bazel.build/versions/master/be/common-definitions.html

Change-Id: I89417f6f9d56e126a6b05edeaaa946934799ab23

tools/eclipse/BUILD

@@ -37,13 +37,13 @@ DEPS = [
 
 java_library(
     name = "classpath",
-    testonly = 1,
+    testonly = True,
     runtime_deps = LIBS + PGMLIBS + DEPS,
 )
 
 classpath_collector(
     name = "main_classpath_collect",
-    testonly = 1,
+    testonly = True,
     deps = LIBS + PGMLIBS + DEPS + TEST_DEPS +
            ["//plugins/%s:%s__plugin" % (n, n) for n in CORE_PLUGINS + CUSTOM_PLUGINS] +
            ["//plugins/%s:%s__plugin_test_deps" % (n, n) for n in CUSTOM_PLUGINS_TEST_DEPS],

tools/maven/package.bzl

@@ -50,7 +50,7 @@ def maven_package(
         srcs = api_targets,
         outs = ["api_install.sh"],
         executable = True,
-        testonly = 1,
+        testonly = True,
     )
 
     if repository and url:
@@ -70,7 +70,7 @@ def maven_package(
             srcs = api_targets,
             outs = ["api_deploy.sh"],
             executable = True,
-            testonly = 1,
+            testonly = True,
         )
 
     war_cmd = mvn_cmd[:]