call exec on launcher scripts

Author: nrdxp

src/universal/bin/eckeygen

@@ -2,4 +2,4 @@
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
-./bin/mantis -- eckeygen "$@"
+exec ./bin/mantis -- eckeygen "$@"

src/universal/bin/faucet-server

@@ -2,4 +2,4 @@
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
-./bin/mantis -Dconfig.file=./conf/faucet.conf "$@" -- faucet 
+exec ./bin/mantis -Dconfig.file=./conf/faucet.conf "$@" -- faucet

src/universal/bin/mantis-launcher

@@ -11,4 +11,4 @@ elif [ -z "$1" ]; then
   CHAIN_PARAM="-Dconfig.file=./conf/etc.conf"
 fi
 
-./bin/mantis ${CHAIN_PARAM:+"$CHAIN_PARAM"} "$@"
+exec ./bin/mantis ${CHAIN_PARAM:+"$CHAIN_PARAM"} "$@"

src/universal/bin/mantis-vm

@@ -3,4 +3,4 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
 
-./bin/mantis vm-server "$@"
+exec ./bin/mantis vm-server "$@"

src/universal/bin/signatureValidator

@@ -2,4 +2,4 @@
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..
-./bin/mantis -- signature-validator "$@"
+exec ./bin/mantis -- signature-validator "$@"