Use jdk8 by default in shell scripts invoked by CI

Author: jyemin

.evergreen/run-connectivity-tests.sh

@@ -9,7 +9,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 # Support arguments:
 #       Pass as many MongoDB URIS as arguments to this script as required
 
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 
 ############################################
 #            Main Program                  #

.evergreen/run-gssapi-auth-test.sh

@@ -12,7 +12,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 #       KEYTAB_BASE64           The BASE64-encoded keytab
 #       PROJECT_DIRECTORY       The project directory
 
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 
 ############################################
 #            Main Program                  #

.evergreen/run-mmapv1-storage-test.sh

@@ -7,7 +7,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 #       JDK                     Set the version of java to be used.  Java versions can be set from the java toolchain /opt/java
 #                               "jdk5", "jdk6", "jdk7", "jdk8", "jdk9"
 
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 
 ############################################
 #            Main Program                  #

.evergreen/run-plain-auth-test.sh

@@ -8,7 +8,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 #       JDK                     Set the version of java to be used.  Java versions can be set from the java toolchain /opt/java
 #                               "jdk5", "jdk6", "jdk7", "jdk8", "jdk9"
 
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 
 ############################################
 #            Main Program                  #

.evergreen/run-socket-tests.sh

@@ -14,7 +14,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 
 AUTH=${AUTH:-noauth}
 MONGODB_URI=${MONGODB_URI:-}
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 TOPOLOGY=${TOPOLOGY:-server}
 COMPRESSOR=${COMPRESSOR:-}
 

.evergreen/run-tests.sh

@@ -20,7 +20,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 AUTH=${AUTH:-noauth}
 SSL=${SSL:-nossl}
 MONGODB_URI=${MONGODB_URI:-}
-JDK=${JDK:-jdk}
+JDK=${JDK:-jdk8}
 TOPOLOGY=${TOPOLOGY:-server}
 COMPRESSOR=${COMPRESSOR:-}
 STREAM_TYPE=${STREAM_TYPE:-nio2}