Remove private credentials, allow running as unprivileged user

- remove gitlab credentials
- set up default cta user OR
- set up custom user (accept name as an argument)
- add `sudo's` to allow running this script not as root

continuousintegration/buildtree_runner/vmBootstrap/bootstrapSystem.sh

 #!/bin/bash
 
 echo Initializing krb5.conf...
-cp -fv krb5.conf /etc/krb5.conf
-
-echo Adding user
-adduser eric
-passwd eric
-cat >> /etc/sudoers << EOFsudoers
-eric ALL=(ALL) NOPASSWD: ALL
-EOFsudoers
-chmod a+rx ~eric
-sudo -u eric cp gitScripts/.git-* ~eric/
-cat gitScripts/bash_profile.hook >> ~eric/.bash_profile
-sudo -u eric cp tigConf/tigrc ~eric/.tigrc
+sudo cp -fv krb5.conf /etc/krb5.conf
+
+CTAUSER=cta
+if [[ ! -z $1 ]]; then
+	CTAUSER=$1
+fi
+export CTAUSER
+
+echo "Adding user '$CTAUSER'"
+sudo adduser $CTAUSER
+sudo passwd $CTAUSER
+
+sudo -E bash -c 'cat >> /etc/sudoers << EOFsudoers
+$CTAUSER ALL=(ALL) NOPASSWD: ALL
+EOFsudoers'
+
+CTAUSERHOME=`eval echo ~$CTAUSER`
+export CTAUSERHOME
+sudo chmod a+rx $CTAUSERHOME
+
+sudo -u $CTAUSER cp gitScripts/.git-* $CTAUSERHOME/
+sudo -E bash -c 'cat gitScripts/bash_profile.hook >> $CTAUSERHOME/.bash_profile'
+sudo -u $CTAUSER cp tigConf/tigrc $CTAUSERHOME/.tigrc
 
 echo Installing minimal tools and tape tools
 sudo yum install -y git cmake rpm-build gcc gcc-c++ vim gdb cgdb strace ltrace screen tig lsscsi mt-st mtx sg3_utils jq psmisc mariadb-devel yum-plugin-versionlock krb5-workstation wget yum-utils
@@ -21,8 +32,3 @@ echo Installing Oracle instant client
 sudo wget https://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol7 -O /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
 sudo wget https://yum.oracle.com/public-yum-ol7.repo -O /etc/yum.repos.d/public-yum-ol7.repo
 sudo yum install -y oracle-instantclient19.3-basic.x86_64 oracle-instantclient19.3-devel.x86_64 --enablerepo=ol7_oracle_instantclient
-
-(cd / ; sudo -u eric git config --global color.ui true)
-(cd / ; sudo -u eric git config --global user.email "Eric.Cano@cern.ch")
-(cd / ; sudo -u eric git config --global user.name "Eric Cano")
-