build: skip Maven download logs (#434)

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Synth log will be available here:
https://source.cloud.google.com/results/invocations/8440e2da-528d-412a-bf89-385b5618d6dd/targets

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Source-Link: googleapis/synthtool@1aeca92

Author: yoshi-automation

.kokoro/build.sh

@@ -60,6 +60,7 @@ javadoc)
     ;;
 integration)
     mvn -B ${INTEGRATION_TEST_ARGS} \
+      -ntp \
       -Penable-integration-tests \
       -DtrimStackTrace=false \
       -Dclirr.skip=true \
@@ -81,6 +82,7 @@ samples)
         pushd ${SAMPLES_DIR}
         mvn -B \
           -Penable-samples \
+          -ntp \
           -DtrimStackTrace=false \
           -Dclirr.skip=true \
           -Denforcer.skip=true \

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-speech.git",
-        "sha": "b4d8554b2b0348c65279438a625d5e0e874a344c"
+        "sha": "a4885d17f6b4a7f4969ad7f8de13850a25924e59"
       }
     },
     {
@@ -27,7 +27,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "b416a7befcdbc42de41cf387dcf428f894fb812b"
+        "sha": "1aeca92e4a38f47134cb955f52ea76f84f09ff88"
       }
     }
   ],