Workaround IPv6 broken //test/exe:main_common_test (#2650)
Workaround IPv6 broken //test/exe:main_common_test (#2650)

This test used hardcoded IPv4 address and was not parameterized to work
in IPv6 only environments. For now, no-op the test unless v4 is
available. Issue #2649 filed to fix the test properly.

Testing: bazel test //test/exe:main_common_test on v4 and v6 supporting
systems.

Signed-off-by: Dan Noé <d2d710f94b5205d35e9edd0b0d914dc9c9f70ce7@google.com>
istio/envoy,envoyproxy/envoy,istio/envoy,lizan/envoy,lyft/envoy,lyft/envoy,craffert0/envoy,envoyproxy/envoy-wasm,lyft/envoy,lizan/envoy,jrajahalme/envoy,dnoe/envoy,dnoe/envoy,eklitzke/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,sebrandon1/envoy,craffert0/envoy,sebrandon1/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,jrajahalme/envoy,istio/envoy,lizan/envoy,dnoe/envoy,jrajahalme/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lizan/envoy,eklitzke/envoy,istio/envoy,istio/envoy,jrajahalme/envoy,envoyproxy/envoy,lizan/envoy,craffert0/envoy,sebrandon1/envoy,envoyproxy/envoy,dnoe/envoy,jrajahalme/envoy,envoyproxy/envoy,envoyproxy/envoy,istio/envoy,eklitzke/envoy,lizan/envoy,envoyproxy/envoy-wasm,istio/envoy,eklitzke/envoy,envoyproxy/envoy,sebrandon1/envoy,jrajahalme/envoy,craffert0/envoy,envoyproxy/envoy-wasm,sebrandon1/envoy,envoyproxy/envoy,dnoe/envoy