Install murano-apps before import its content

Forgot to install package murano-apps, now fix it.
Add category when importing packages.
Option '-c' must be specified after the target directory name.
Typos fixes.
Add workaround to call import-package only once per package.

Relates-bug: 1316069

Change-Id: I49cc86e60b446355093a85747256113b5f6a8d16
Merge "Install murano-apps before import its content"