Merge branch 'slf4j-squelch' into 'main'

prevent SLF4J startup messages from printing to stderr

See merge request weblogic-cloud/weblogic-deploy-tooling!1744

Author: robertpatrick

installer/src/main/bin/shared.cmd

@@ -280,6 +280,8 @@ GOTO :EOF
 
     SET "WLST_PROPERTIES=-Dcom.oracle.cie.script.throwException=true"
     SET "WLST_PROPERTIES=%WLST_PROPERTIES% -Djava.util.logging.config.class=%LOG_CONFIG_CLASS%"
+    SET "WLST_PROPERTIES=%WLST_PROPERTIES% -Dslf4j.provider=org.slf4j.jul.JULServiceProvider"
+    SET "WLST_PROPERTIES=%WLST_PROPERTIES% -Dslf4j.internal.verbosity=ERROR"
     SET "WLST_PROPERTIES=%WLST_PROPERTIES% %WLSDEPLOY_PROPERTIES%"
 
     @REM print the configuration, and run the script

installer/src/main/bin/shared.sh

@@ -225,7 +225,6 @@ runWlst() {
             CLASSPATH="${WLSDEPLOY_HOME}/lib/weblogic-deploy-core.jar"; export CLASSPATH
         fi
 
-
         if [ -z "${WLST}" ]; then
             echo "Unable to determine WLS version in ${ORACLE_HOME} to determine WLST shell script to call" >&2
             exit 98
@@ -234,6 +233,8 @@ runWlst() {
 
     WLST_PROPERTIES=-Dcom.oracle.cie.script.throwException=true
     WLST_PROPERTIES="${WLST_PROPERTIES} -Djava.util.logging.config.class=${LOG_CONFIG_CLASS}"
+    WLST_PROPERTIES="${WLST_PROPERTIES} -Dslf4j.provider=org.slf4j.jul.JULServiceProvider"
+    WLST_PROPERTIES="${WLST_PROPERTIES} -Dslf4j.internal.verbosity=ERROR"
     WLST_PROPERTIES="${WLST_PROPERTIES} ${WLSDEPLOY_PROPERTIES}"
     export WLST_PROPERTIES