Update concurrency

Signed-off-by: Matt Lord <mattalord@gmail.com>

Author: mattlord

.buildkite/pipeline.yml

@@ -16,7 +16,7 @@ steps:
     - rm $GO_VERSION_FILE
     - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
     - make upgrade-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/upgrade-downgrade-test'
     timeout_in_minutes: 30
     plugins:
@@ -44,7 +44,7 @@ steps:
     - rm $GO_VERSION_FILE
     - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
     - make backup-restore-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/backup-restore-test'
     timeout_in_minutes: 20
     plugins:
@@ -65,7 +65,7 @@ steps:
       - rm $GO_VERSION_FILE
       - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
       - make backup-schedule-keyspace-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/backup-schedule-keyspace-test'
     timeout_in_minutes: 20
     plugins:
@@ -86,7 +86,7 @@ steps:
       - rm $GO_VERSION_FILE
       - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
       - make backup-schedule-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/backup-schedule-test'
     timeout_in_minutes: 20
     plugins:
@@ -107,7 +107,7 @@ steps:
       - rm $GO_VERSION_FILE
       - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
       - make backup-schedule-vtctldclient-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/backup-schedule-vtctldclient-test'
     timeout_in_minutes: 20
     plugins:
@@ -128,7 +128,7 @@ steps:
     - rm $GO_VERSION_FILE
     - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
     - make vtorc-vtadmin-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/vtorc-vtadmin-test'
     timeout_in_minutes: 20
     plugins:
@@ -149,7 +149,7 @@ steps:
     - rm $GO_VERSION_FILE
     - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
     - make unmanaged-tablet-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/unmanaged-tablet-test'
     timeout_in_minutes: 20
     plugins:
@@ -170,7 +170,7 @@ steps:
     - rm $GO_VERSION_FILE
     - ln -s /lib/libc.so.6 /usr/lib/libresolv.so.2
     - make hpa-test
-    concurrency: 1
+    concurrency: 3
     concurrency_group: 'vtop/hpa-test'
     timeout_in_minutes: 20
     plugins: