GEODE-6135 - Changes to support running in CI.

* Allow output directory to be overridden via commandline in
  run_against_baseline.sh
* Change how branch/tag is checked out in run_tests.sh to support
  SHA references as well
* Minor code cleanup in DestroyCluster class

Authored-by: Sean Goller <sgoller@pivotal.io>
diff --git a/infrastructure/scripts/aws/run_against_baseline.sh b/infrastructure/scripts/aws/run_against_baseline.sh
index 1bcb935..1890b45 100755
--- a/infrastructure/scripts/aws/run_against_baseline.sh
+++ b/infrastructure/scripts/aws/run_against_baseline.sh
@@ -22,7 +22,7 @@
 BRANCH=${2:-develop}
 BASELINE=${3:-"rel/v1.8.0"}
 BENCHMARK_BRANCH=${4:-develop}
-OUTPUT=output-${DATE}-${TAG}
-
-./run_tests.sh ${TAG} ${BRANCH} ${OUTPUT}/branch ${BENCHMARK_BRANCH}
-./run_tests.sh ${TAG} ${BASELINE} ${OUTPUT}/baseline ${BENCHMARK_BRANCH}
+DEFAULT_OUTPUT_DIR=output-${DATE}-${TAG}
+OUTPUT=${5:-${DEFAULT_OUTPUT_DIR}}
+./run_tests.sh ${TAG} ${BRANCH} ${BENCHMARK_BRANCH} ${OUTPUT}/branch
+./run_tests.sh ${TAG} ${BASELINE} ${BENCHMARK_BRANCH} ${OUTPUT}/baseline
diff --git a/infrastructure/scripts/aws/run_tests.sh b/infrastructure/scripts/aws/run_tests.sh
index 2295c80..ca583d0 100755
--- a/infrastructure/scripts/aws/run_tests.sh
+++ b/infrastructure/scripts/aws/run_tests.sh
@@ -24,7 +24,7 @@
 OUTPUT=${4:-output-${DATE}-${TAG}}
 PREFIX="geode-performance-${TAG}"
 
-SSH_OPTIONS="-i ~/.ssh/geode-benchmarks/${TAG}.pem"
+SSH_OPTIONS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i ~/.ssh/geode-benchmarks/${TAG}.pem"
 HOSTS=`aws ec2 describe-instances --query 'Reservations[*].Instances[*].PrivateIpAddress' --filter "Name=tag:geode-benchmarks,Values=${TAG}" --output text`
 HOSTS=$(echo ${HOSTS} | tr ' ' ',')
 FIRST_INSTANCE=`aws ec2 describe-instances --query 'Reservations[*].Instances[*].PublicIpAddress' --filter "Name=tag:geode-benchmarks,Values=${TAG}" --output text | cut -f 1`
@@ -34,10 +34,9 @@
 
 ssh ${SSH_OPTIONS} geode@$FIRST_INSTANCE "\
   rm -rf geode-benchmarks geode && \
-  git clone --depth=1 https://github.com/apache/geode --branch ${BRANCH} geode && \
-  cd geode && \
-  ./gradlew pTML -PversionNumber=${DATE} -PreleaseType="-BENCHMARKBUILD" && \
-  cd .. && \
+  git clone https://github.com/apache/geode geode && \
+  (pushd geode; git checkout ${BRANCH}) && \
+  (pushd geode; ./gradlew pTML -PversionNumber=${DATE} -PreleaseType="-BENCHMARKBUILD") && \
   git clone https://github.com/apache/geode-benchmarks --branch ${BENCHMARK_BRANCH} && \
   cd geode-benchmarks && \
   ./gradlew -PgeodeVersion=${DATE}-BENCHMARKBUILD benchmark -Phosts=${HOSTS}"
@@ -48,4 +47,3 @@
 scp ${SSH_OPTIONS} -r geode@${FIRST_INSTANCE}:geode-benchmarks/geode-benchmarks/build/reports ${OUTPUT}/reports
 BENCHMARK_DIRECTORY="$(ssh ${SSH_OPTIONS} geode@${FIRST_INSTANCE} ls -l geode-benchmarks/geode-benchmarks/build/ | grep benchmark | awk 'NF>1{print $NF}')"
 scp ${SSH_OPTIONS} -r geode@${FIRST_INSTANCE}:geode-benchmarks/geode-benchmarks/build/${BENCHMARK_DIRECTORY} ${OUTPUT}
-
diff --git a/infrastructure/src/main/java/org/apache/geode/infrastructure/aws/DestroyCluster.java b/infrastructure/src/main/java/org/apache/geode/infrastructure/aws/DestroyCluster.java
index 5018aab..c6f7070 100644
--- a/infrastructure/src/main/java/org/apache/geode/infrastructure/aws/DestroyCluster.java
+++ b/infrastructure/src/main/java/org/apache/geode/infrastructure/aws/DestroyCluster.java
@@ -26,6 +26,7 @@
 
 import software.amazon.awssdk.services.ec2.Ec2Client;
 import software.amazon.awssdk.services.ec2.model.DeleteKeyPairRequest;
+import software.amazon.awssdk.services.ec2.model.DeleteKeyPairResponse;
 import software.amazon.awssdk.services.ec2.model.DeleteLaunchTemplateRequest;
 import software.amazon.awssdk.services.ec2.model.DeletePlacementGroupRequest;
 import software.amazon.awssdk.services.ec2.model.DeleteSecurityGroupRequest;
@@ -59,11 +60,12 @@
 
   private static void deleteKeyPair(String benchmarkTag) {
     try {
-      ec2.deleteKeyPair(
-          DeleteKeyPairRequest.builder().keyName(AwsBenchmarkMetadata.keyPair(benchmarkTag))
-              .build());
+      System.out.println("Deleting cluster keypair: " + AwsBenchmarkMetadata.keyPair(benchmarkTag));
+      ec2.deleteKeyPair(DeleteKeyPairRequest.builder()
+          .keyName(AwsBenchmarkMetadata.keyPair(benchmarkTag))
+          .build());
       Files.deleteIfExists(Paths.get(AwsBenchmarkMetadata.keyPairFileName(benchmarkTag)));
-      System.out.println("Key Pair for cluster'" + benchmarkTag + "' deleted.");
+      System.out.println("Key Pair for cluster '" + benchmarkTag + "' deleted.");
     } catch (Exception e) {
       System.out.println("We got an exception while deleting the Key pair");
       System.out.println("Exception message: " + e);
@@ -74,8 +76,8 @@
     // delete instances
     try {
       DescribeInstancesResponse dir = ec2.describeInstances(DescribeInstancesRequest.builder()
-          .filters(
-              Filter.builder().name("tag:" + BenchmarkMetadata.PREFIX).values(benchmarkTag).build())
+          .filters(Filter.builder()
+              .name("tag:" + BenchmarkMetadata.PREFIX).values(benchmarkTag).build())
           .build());
       Stream<Instance> instanceStream = dir.reservations()
           .stream()