Revert "stop overriding max concurrency in CI, let automax procs handle it"

This reverts changes from commit 9e42056.

NOTE: this is not a clean revert bcause of further changes.

Author: BenTheElder

hack/jenkins/test-dockerized.sh

@@ -25,6 +25,10 @@ set -x;
 # TODO: make test-integration should handle this automatically
 source ./hack/install-etcd.sh
 
+# TODO: drop KUBE_INTEGRATION_TEST_MAX_CONCURRENCY later when we've figured out 
+# stabilizing the tests / CI Setting this to a hardcoded value is fragile.
+export KUBE_INTEGRATION_TEST_MAX_CONCURRENCY=4
+
 # Save the verbose stdout as well.
 export KUBE_KEEP_VERBOSE_TEST_OUTPUT=y
 export LOG_LEVEL=4

hack/jenkins/test-integration-dockerized.sh

@@ -26,4 +26,8 @@ set -x;
 # TODO: make test-integration should handle this automatically
 source ./hack/install-etcd.sh
 
+# TODO: drop KUBE_INTEGRATION_TEST_MAX_CONCURRENCY later when we've figured out 
+# stabilizing the tests / CI Setting this to a hardcoded value is fragile.
+export KUBE_INTEGRATION_TEST_MAX_CONCURRENCY=4
+
 make test-integration KUBE_KEEP_VERBOSE_TEST_OUTPUT=y LOG_LEVEL=4