- Test cases for all the implemented servoces were added
- All services using the request identifier are not tested yet, due to
the restrictions described in the merege request !27

- This operator needs to be defined well, when the application ID and
sequence count is implemented

- Added a less than or equal to comaprison operator in the check of the
string size vs its capacity. If the operator is <, then errors are
thrown in the case where the string is fully loaded.

- Used a docker image with a more recent version of Debian
- Enabled colours for gcc and clang
- Updated clang-tidy from 4.0 to 7.0
- Enabled some diagnostic checks for clang-tidy, and disabled others that gave false positives
- Made clang-tidy read system header files, while ignoring their errors

- Preliminary implementation of servoces

- Added search functionallity, in order to find the required elemetns in
the vector array
- Implemented request identifier parsing
- Implementd the deletion of activity identified by the request
identifier