feat: Enable Discovery Service class path extensions and Gateway native library extensions (#1987)

* Add ZWE_DISCOVERY_SHARED_LIBS

Signed-off-by: Carson Cook <carson.cook@ibm.com>

* Add ZWE_GATEWAY_LIBRARY_PATH

Signed-off-by: Carson Cook <carson.cook@ibm.com>

* Update version

* Fix typo in discovery shared lib

Signed-off-by: Carson Cook <carson.cook@ibm.com>

Co-authored-by: Zowe Robot <zowe-robot@users.noreply.github.com>

Author: CarsonCook

discovery-package/src/main/resources/bin/start.sh

@@ -67,6 +67,13 @@ if [ `uname` = "OS/390" ]; then
     QUICK_START=-Xquickstart
 fi
 
+DISCOVERY_LOADER_PATH=${COMMON_LIB}
+
+if [[ ! -z ${ZWE_DISCOVERY_SHARED_LIBS} ]]
+then
+    DISCOVERY_LOADER_PATH=${ZWE_DISCOVERY_SHARED_LIBS},${DISCOVERY_LOADER_PATH}
+fi
+
 EXPLORER_HOST=${ZOWE_EXPLORER_HOST:-localhost}
 DISCOVERY_SERVICE_PORT=${DISCOVERY_PORT:-7553}
 
@@ -109,7 +116,7 @@ _BPX_JOBNAME=${ZOWE_PREFIX}${DISCOVERY_CODE} java -Xms32m -Xmx256m ${QUICK_START
     -Dserver.ssl.trustStoreType="${KEYSTORE_TYPE:-PKCS12}" \
     -Dserver.ssl.trustStorePassword="${KEYSTORE_PASSWORD}" \
     -Djava.protocol.handler.pkgs=com.ibm.crypto.provider \
-    -Dloader.path=${COMMON_LIB} \
+    -Dloader.path=${DISCOVERY_LOADER_PATH} \
     -Djava.library.path=${LIBPATH} \
     -jar "${JAR_FILE}" &
 pid=$!

gateway-package/src/main/resources/bin/start.sh

@@ -97,6 +97,11 @@ LIBPATH="$LIBPATH":"${JAVA_HOME}"/lib/s390/default
 LIBPATH="$LIBPATH":"${JAVA_HOME}"/lib/s390/j9vm
 LIBPATH="$LIBPATH":"${LIBRARY_PATH}"
 
+if [[ ! -z ${ZWE_GATEWAY_LIBRARY_PATH} ]]
+then
+    LIBPATH="$LIBPATH":"${ZWE_GATEWAY_LIBRARY_PATH}"
+fi
+
 GATEWAY_CODE=AG
 _BPX_JOBNAME=${ZOWE_PREFIX}${GATEWAY_CODE} java \
     -Xms32m -Xmx256m \