refactoring changes from sequpgrade (endReturn, ...) and some modernizations

seqs/couchpotato.sh

@@ -25,7 +25,7 @@ seq_config() {
   return 0
 }
 
-step_1_info() { 
+step_1_info() {
   echo "Install $toolName"
   echoinfo "Default port: 5050"
 }
@@ -34,7 +34,7 @@ step_1() {
   exe apt update
   exe apt install $toolDeps $APTOPT
   exe pip install --upgrade pyopenssl
-  endReturn -o $? "Pip install pyopenssl failed"
+  endReturn "Pip install pyopenssl failed"
 }
 
 step_2_info() { echo "Clone git repository"; }
@@ -51,7 +51,7 @@ step_3() {
 step_4_info() { echo "Create systemd service"; }
 step_4() {
   exe cp "$CPO_INSTALL_DIR/init/couchpotato.service" "/etc/systemd/system"
-  endReturn -o $? "Creating service file failed"
+  endReturn "Creating service file failed"
   exe systemctl daemon-reload
 }