Attempt to fix flaky bazel tests

.bazelrc

@@ -0,0 +1,2 @@
+# TODO(yannic): Remove once we are sure that the tests pass reliably.
+test --flaky_test_attempts=10

WORKSPACE

@@ -4,10 +4,10 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "io_bazel_rules_closure",
-    sha256 = "319e5e0127a83436b55588877a9d81464c2780c0dffc809065cf299d772670f5",
-    strip_prefix = "rules_closure-87d24b1df8b62405de8dd059cb604fd9d4b1e395",
+    sha256 = "1f8d2e169bb292ef2adbe563bd66d5b8d4b462b6b869a67647e771ecef4b5030",
+    strip_prefix = "rules_closure-a176ec89a1b251bb5442ba569d47cee3c053e633",
     urls = [
-        "https://github.com/bazelbuild/rules_closure/archive/87d24b1df8b62405de8dd059cb604fd9d4b1e395.zip",
+        "https://github.com/bazelbuild/rules_closure/archive/a176ec89a1b251bb5442ba569d47cee3c053e633.zip",
     ],
 )
 

scripts/kokoro.sh

@@ -33,7 +33,7 @@ BAZEL_FILES=$(find "${REPO_DIR}" \
 ./buildifier -mode check ${BAZEL_FILES[@]}
 
 # These programs need to be already installed
-progs=(docker docker-compose bazel npm curl)
+progs=(docker docker-compose npm curl)
 for p in "${progs[@]}"
 do
   command -v "$p" > /dev/null 2>&1 || \
@@ -48,11 +48,11 @@ BAZEL_VERSION=0.23.1
 wget https://github.com/bazelbuild/bazel/releases/download/"${BAZEL_VERSION}"/bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 chmod +x ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh --user
+rm ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 $HOME/bin/bazel version
 $HOME/bin/bazel test \
   //javascript/net/grpc/web/... \
   //net/grpc/gateway/examples/...
-rm ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 
 # Build the grpc-web npm package
 cd packages/grpc-web && \