Add tests for project actions

[enriquezrene]

The following project actions have no tests, add them:

export class LoadProjects implements Action {
  public readonly type = ProjectActionTypes.LOAD_PROJECTS;
  constructor() {}
}
 
export class LoadProjectsSuccess implements Action {
  readonly type = ProjectActionTypes.LOAD_PROJECTS_SUCCESS;
  constructor(readonly payload: Project[]) {}
}