TT#41051 Fix shellcheck warning for Red Hat init scripts

* warning: cachefile appears unused. Verify it or export it. [SC2034]
* warning: Double quote to prevent globbing and word splitting. [SC2086]
* removed unnecessary space

Change-Id: I71276ca08d1a5599bf1034403d2973ef78d8079e

el/rtpengine-recording.init

@@ -31,7 +31,7 @@ prog=rtpengine-recording
 runfile=/usr/sbin/${prog}
 pidfile=${PIDFILE-/var/run/rtpengine-recording.pid}
 lockfile=${LOCKFILE-/var/lock/subsys/rtpengine-recording}
-cachefile=/var/lib/ngcp-rtpengine/$prog.cfg
+
 RETVAL=0
 OPTS=""
 

el/rtpengine.init

@@ -48,19 +48,19 @@ build_opts() {
 		fi
 	else
 		# configfile exists?
-		if [ ! -f $configfile ];then
+		if [ ! -f "$configfile" ];then
 			echo "Error: $configfile not present"
 			exit -1
 		fi
 
 		# get table variable from config
-		table="$(grep -Ei '^table' $configfile|cut -d\  -f3)"
+		table="$(grep -Ei '^table' "$configfile" | cut -d\  -f3)"
-		if [ -z $table ];then
+		if [ -z "$table" ];then
-			table="$(grep -Ei '^table' $configfile|cut -d= -f3)"
+			table="$(grep -Ei '^table' "$configfile" | cut -d= -f3)"
 		fi
 
 		# error if directive is not presented in config
-		if [ -z $table ];then
+		if [ -z "$table" ];then
 			echo "Error: directive table= is not present in $configfile"
 			exit -1
 		fi