Fix memory leaks on error return path and clean up to redundant assignments

[ColinIanKing]

Description

Clean up errors found with static analysis with cppcheck. There are some assignments that are redundant and can be removed. Also there are 4 memory leaks in inlined functions in unit-test/pqos/caps_gen.h that are fixed.

Affected parts

• [ ] library
• [ ] pqos utility
• [ ] rdtset utility
• [ ] App QoS
• [x] other: unit-test and examples

Motivation and Context

Cleans up minor issues found using static analysis

How Has This Been Tested?

Build tested and re-tested against static analysis tools

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• [x ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.

[aleksinx]

Thank you for your contribution, the changes have been merged into master