influxdb fails to install in CentOS 8

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. Install CentOS 8
2. Add the influxdb repo
3. Try to install influxdb

__Expected behavior:__
It should install influxdb.

__Actual behavior:__
The installation process fails.

```
[root@web4 ~]# dnf install influxdb
InfluxDB Repository 2.4 kB/s | 2.5 kB 00:01
Dependencies resolved.
=====================================================================================================================================================================================================================
Package Arch Version Repository Size
=====================================================================================================================================================================================================================
Installing:
influxdb x86_64 1.7.9-1 influxdb 60 M

Transaction Summary
=====================================================================================================================================================================================================================
Install 1 Package

Total download size: 60 M
Installed size: 60 M
Is this ok [y/N]: y
Downloading Packages:
influxdb-1.7.9.x86_64.rpm 31 MB/s | 60 MB 00:01
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 31 MB/s | 60 MB 00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Running scriptlet: influxdb-1.7.9-1.x86_64 1/1
error: failed to exec scriptlet interpreter /bin/sh: Permission denied
error: %prein(influxdb-1.7.9-1.x86_64) scriptlet failed, exit status 127

Error in PREIN scriptlet in rpm package influxdb
Verifying : influxdb-1.7.9-1.x86_64 1/1

Failed:
influxdb-1.7.9-1.x86_64

Error: Transaction failed
```

__Environment info:__

* System info: Linux 4.18.0-80.11.2.el8_0.x86_64 x86_64
* InfluxDB version: 1.7.9
* Other relevant environment details: not really