[SPARK-25712][CORE][MINOR] Improve usage message of start-master.sh a…

…nd start-slave.sh

## What changes were proposed in this pull request?

Currently if we run
```
./sbin/start-master.sh -h
```
We get
```
Usage: ./sbin/start-master.sh [options]
18/10/11 23:38:30 INFO Master: Started daemon with process name: 33907C02TL2JZGTF1
18/10/11 23:38:30 INFO SignalUtils: Registered signal handler for TERM
18/10/11 23:38:30 INFO SignalUtils: Registered signal handler for HUP
18/10/11 23:38:30 INFO SignalUtils: Registered signal handler for INT

Options:
  -i HOST, --ip HOST     Hostname to listen on (deprecated, please use --host or -h)
  -h HOST, --host HOST   Hostname to listen on
  -p PORT, --port PORT   Port to listen on (default: 7077)
  --webui-port PORT      Port for web UI (default: 8080)
  --properties-file FILE Path to a custom Spark properties file.
                         Default is conf/spark-defaults.conf.
```
We can filter out some useless output.

## How was this patch tested?

Manual test

Closes #22700 from gengliangwang/improveStartScript.

Authored-by: Gengliang Wang <gengliang.wang@databricks.com>
Signed-off-by: Sean Owen <sean.owen@databricks.com>

sbin/start-master.sh

@@ -31,7 +31,8 @@ if [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
   echo "Usage: ./sbin/start-master.sh [options]"
   pattern="Usage:"
   pattern+="\|Using Spark's default log4j profile:"
-  pattern+="\|Registered signal handlers for"
+  pattern+="\|Started daemon with process name"
+  pattern+="\|Registered signal handler for"
 
   "${SPARK_HOME}"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
   exit 1

sbin/start-slave.sh

@@ -43,7 +43,8 @@ if [[ $# -lt 1 ]] || [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
   echo "Usage: ./sbin/start-slave.sh [options] <master>"
   pattern="Usage:"
   pattern+="\|Using Spark's default log4j profile:"
-  pattern+="\|Registered signal handlers for"
+  pattern+="\|Started daemon with process name"
+  pattern+="\|Registered signal handler for"
 
   "${SPARK_HOME}"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
   exit 1