RPM Package: useradd: command not found

[94d90b08-c4ef-416c-bf7b-b6c5b7275e6a]

System info:
OS: CentOS 7.4 - during installation
InfluxDB version: influxdb-1.3.1-1.x86_64
RPM Package

Steps to reproduce:

1. Add influxdb RPM package on CentOS 7 installation
2. Install CentOS with influx
3. See /var/log/anaconda/journal.log after CentOS 7 installation

Expected behaviour: log not contain errors with influxdb RPM package
Actual behaviour:

influxdb-1.3.1-1.x86_64 (235/475)
/var/tmp/rpm-tmp.AkjiyP: line 29: useradd: command not found
chown: invalid user: 'influxdb:influxdb'
chown: invalid user: 'influxdb:influxdb'

Reason: on CentOS installation may not useadd command. it provided by shadow-utils package that may be installed later that influx

Solution: add shadow-utils package as influxdb dependency.