fix 'No Such File' error when execute script out of druid installation directory (#3517)

examples/bin/broker.sh

@@ -7,4 +7,5 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
+cd $(dirname $0)/../
 sh ./bin/node.sh broker $1

examples/bin/coordinator.sh

@@ -7,4 +7,5 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
+cd $(dirname $0)/../
 sh ./bin/node.sh coordinator $1

examples/bin/historical.sh

@@ -7,4 +7,5 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
+cd $(dirname $0)/../
 sh ./bin/node.sh historical $1

examples/bin/middleManager.sh

@@ -7,4 +7,5 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
+cd $(dirname $0)/../
 sh ./bin/node.sh middleManager $1

examples/bin/overlord.sh

@@ -7,4 +7,5 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
+cd $(dirname $0)/../
 sh ./bin/node.sh overlord $1