fix: don't log downloads

@chingor13 This change keeps Maven 3.6.1 and later from spamming our CI logs with page after page of lists of artifacts it's downloading that makes it much harder to find the actual test output.

Source-Author: Elliotte Rusty Harold <[email protected]>
Source-Date: Thu Feb 18 19:58:59 2021 +0000
Source-Repo: googleapis/synthtool
Source-Sha: 1aeca92e4a38f47134cb955f52ea76f84f09ff88
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

@@ -11,7 +11,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "b416a7befcdbc42de41cf387dcf428f894fb812b"
+        "sha": "1aeca92e4a38f47134cb955f52ea76f84f09ff88"
       }
     }
   ],