Switch to latest release in docker autoconf tests (#245)

* switch to current version for docker_toolchain_autoconfig tests

* use 020rc for rc tests

* trying to run presubmits without cache hits

* remove temporary change to flush cache

tests/config/BUILD

diff --git a/tests/config/BUILD b/tests/config/BUILD
index 95cfb2f..3317cb5 100644
--- a/tests/config/BUILD
+++ b/tests/config/BUILD
@@ -27,11 +27,9 @@
     "gcc_env",
 )
 
-bazel_latest_release = "0.19.0"
+bazel_next_release = "0.20.0"
 
-bazel_next_release = "0.19.2"
-
-bazel_next_release_rc = "2"
+bazel_next_release_rc = "3"
 
 # Use "rbe-test-" prefix for easy identification of images to remove after the tests.
 toolchain_container(
@@ -49,8 +47,6 @@
 docker_toolchain_autoconfig(
     name = "debian-jessie-autoconfig",
     base = ":rbe-test-jessie-with-pkgs.tar",
-    # TODO(nlopezgi): remove after bazel 0.19.2 is out
-    bazel_version = bazel_latest_release,
     env = gcc_env(),
     tags = ["manual"],
     test = True,
@@ -65,15 +61,6 @@
     use_bazel_head = True,
 )
 
-docker_toolchain_autoconfig(
-    name = "debian-jessie-custom-bazel-version-autoconfig",
-    base = ":rbe-test-jessie-with-pkgs.tar",
-    bazel_version = bazel_latest_release,
-    env = gcc_env(),
-    tags = ["manual"],
-    test = True,
-)
-
 # Note that we only support Bazel rc versions at 0.10.0 or above.
 docker_toolchain_autoconfig(
     name = "debian-jessie-custom-bazel-rc-version-autoconfig",
@@ -111,8 +98,6 @@
 docker_toolchain_autoconfig(
     name = "ubuntu-xenial-autoconfig",
     base = ":rbe-test-xenial-with-pkgs.tar",
-    # TODO(nlopezgi): remove after bazel 0.19.2 is out
-    bazel_version = bazel_latest_release,
     env = gcc_env(),
     tags = ["manual"],
     test = True,
@@ -121,8 +106,6 @@
 docker_toolchain_autoconfig(
     name = "external-repo-autoconfig",
     base = ":rbe-test-xenial-with-pkgs.tar",
-    # TODO(nlopezgi): remove after bazel 0.19.2 is out
-    bazel_version = bazel_latest_release,
     config_repos = [
         "local_config_sh",
         "local_config_cc",
@@ -142,15 +125,6 @@
     use_bazel_head = True,
 )
 
-docker_toolchain_autoconfig(
-    name = "ubuntu-xenial-custom-bazel-version-autoconfig",
-    base = ":rbe-test-xenial-with-pkgs.tar",
-    bazel_version = bazel_latest_release,
-    env = gcc_env(),
-    tags = ["manual"],
-    test = True,
-)
-
 # Note that we only support Bazel rc versions at 0.10.0 or above.
 docker_toolchain_autoconfig(
     name = "ubuntu-xenial-custom-bazel-rc-version-autoconfig",