MDEV-6204: wsrep_sst_rsync timeout when lsof is not installed

* Added a check for lsof
* Added rsync & lsof to debian dependency list.
* Merged r3982 from codership-mysql/wsrep-5.5.

debian/dist/Debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: MariaDB Developers <maria-developers@lists.launchpad.net>
 XSBC-Original-Maintainer: Maria Developers <maria-developers@lists.launchpad.net>
 Uploaders: MariaDB Developers <maria-developers@lists.launchpad.net>
-Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev
+Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev, rsync, lsof
 Standards-Version: 3.8.3
 Homepage: http://mariadb.org/
 Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files

debian/dist/Ubuntu/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: MariaDB Developers <maria-developers@lists.launchpad.net>
 XSBC-Original-Maintainer: Maria Developers <maria-developers@lists.launchpad.net>
 Uploaders: MariaDB Developers <maria-developers@lists.launchpad.net>
-Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev
+Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev, rsync, lsof
 Standards-Version: 3.8.2
 Homepage: http://mariadb.org/
 Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files

scripts/wsrep_sst_rsync.sh

@@ -25,6 +25,9 @@ OS=$(uname)
 
 . $(dirname $0)/wsrep_sst_common
 
+# Setting the path for lsof on CentOS
+export PATH="/usr/sbin:/sbin:$PATH"
+
 cleanup_joiner()
 {
     wsrep_log_info "Joiner cleanup."
@@ -52,6 +55,11 @@ check_pid_and_port()
     local rsync_pid=$2
     local rsync_port=$3
 
+    if ! which lsof > /dev/null; then
+      wsrep_log_error "lsof tool not found in PATH! Make sure you have it installed."
+      exit 2 # ENOENT
+    fi
+
     local port_info=$(lsof -i :$rsync_port -Pn 2>/dev/null | \
         grep "(LISTEN)")
     local is_rsync=$(echo $port_info | \