source ulimit-n.sh so it applies to the current shell

ci/integration-tests.sh

@@ -7,7 +7,7 @@ FEATURES="$1"
 cd "$(dirname "$0")/.."
 source ci/_
 export RUST_BACKTRACE=1
-scripts/ulimit-n.sh
+source scripts/ulimit-n.sh
 
 for test in {,*/}tests/*.rs; do
   test=${test##*/} # basename x

ci/test-coverage.sh

@@ -22,7 +22,7 @@ ci/affects-files.sh \
 
 source ci/upload-ci-artifact.sh
 ci/version-check-with-upgrade.sh nightly
-scripts/ulimit-n.sh
+source scripts/ulimit-n.sh
 
 scripts/coverage.sh
 

ci/test-large-network.sh

@@ -15,7 +15,7 @@ export LD_LIBRARY_PATH=$PWD/target/perf-libs:$LD_LIBRARY_PATH
 
 export RUST_LOG=multinode=info
 
-scripts/ulimit-n.sh
+source scripts/ulimit-n.sh
 
 if [[ $(sysctl -n net.core.rmem_default) -lt 1610612736 ]]; then
   echo 'Error: rmem_default too small, run "sudo sysctl -w net.core.rmem_default=1610612736" to continue'

ci/test-stable.sh

@@ -11,7 +11,7 @@ ci/version-check-with-upgrade.sh stable
 export RUST_BACKTRACE=1
 export RUSTFLAGS="-D warnings"
 
-_ scripts/ulimit-n.sh
+source scripts/ulimit-n.sh
 _ cargo build --all --verbose --features="$FEATURES"
 _ cargo test --all --verbose --features="$FEATURES" --lib -- --nocapture --test-threads=1