test: use bash instead of sh for evergreen scripts

Author: mbroadst

.evergreen/config.yml

@@ -76,7 +76,7 @@ functions:
       params:
         script: |
           ${PREPARE_SHELL}
-          MONGODB_VERSION=${VERSION} TOPOLOGY=${TOPOLOGY} sh ${DRIVERS_TOOLS}/.evergreen/run-orchestration.sh
+          MONGODB_VERSION=${VERSION} TOPOLOGY=${TOPOLOGY} bash ${DRIVERS_TOOLS}/.evergreen/run-orchestration.sh
     - command: expansions.update
       params:
         file: mo-expansion.yml
@@ -87,7 +87,7 @@ functions:
         working_dir: src
         script: |
           ${PREPARE_SHELL}
-          AUTH=${AUTH} SSL=${SSL} MONGODB_URI="${MONGODB_URI}" sh ${PROJECT_DIRECTORY}/.evergreen/run-tests.sh
+          AUTH=${AUTH} SSL=${SSL} MONGODB_URI="${MONGODB_URI}" bash ${PROJECT_DIRECTORY}/.evergreen/run-tests.sh
   cleanup:
     - command: shell.exec
       params:
@@ -117,7 +117,7 @@ functions:
         working_dir: src
         script: |
           ${PREPARE_SHELL}
-          NODE_LTS_NAME=${NODE_LTS_NAME} sh ${PROJECT_DIRECTORY}/.evergreen/install-dependencies.sh
+          NODE_LTS_NAME=${NODE_LTS_NAME} bash ${PROJECT_DIRECTORY}/.evergreen/install-dependencies.sh
   run atlas tests:
     - command: shell.exec
       type: test
@@ -128,7 +128,7 @@ functions:
           # DO NOT ECHO WITH XTRACE (which PREPARE_SHELL does)
 
           NODE_LTS_NAME='${NODE_LTS_NAME}' ATLAS_REPL='${atlas_repl}' ATLAS_SHRD='${atlas_shrd}'
-          ATLAS_FREE='${atlas_free}' ATLAS_TLS11='${atlas_tls11}' ATLAS_TLS12='${atlas_tls12}' sh
+          ATLAS_FREE='${atlas_free}' ATLAS_TLS11='${atlas_tls11}' ATLAS_TLS12='${atlas_tls12}' bash
           ${PROJECT_DIRECTORY}/.evergreen/run-atlas-tests.sh
 pre:
   - func: fetch source

.evergreen/install-dependencies.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # set -o xtrace   # Write all commands first to stderr
 set -o errexit  # Exit the script with error if any of the commands fail
 

.evergreen/run-atlas-tests.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -o errexit  # Exit the script with error if any of the commands fail
 
@@ -7,4 +7,4 @@ NODE_ARTIFACTS_PATH="${PROJECT_DIRECTORY}/node-artifacts"
 export NVM_DIR="${NODE_ARTIFACTS_PATH}/nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
 
-ATLAS_REPL="$ATLAS_REPL" ATLAS_SHRD="$ATLAS_SHRD" ATLAS_FREE="$ATLAS_FREE" ATLAS_TLS11="$ATLAS_TLS11" ATLAS_TLS12="$ATLAS_TLS12" npm run atlas
+ATLAS_REPL="$ATLAS_REPL" ATLAS_SHRD="$ATLAS_SHRD" ATLAS_FREE="$ATLAS_FREE" ATLAS_TLS11="$ATLAS_TLS11" ATLAS_TLS12="$ATLAS_TLS12" npm run atlas

.evergreen/run-tests.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # set -o xtrace   # Write all commands first to stderr
 set -o errexit  # Exit the script with error if any of the commands fail