Error messages of project-keeper-maven-plugin

• E-PK-12
• E-PK-13
• E-PK-14
• E-PK-15
• E-PK-16
• E-PK-17
• E-PK-18
• E-PK-19
• E-PK-24
• E-PK-25
• E-PK-26
• E-PK-27
• E-PK-28
• E-PK-29
• E-PK-30
• E-PK-31
• E-PK-32
• E-PK-33
• E-PK-35
• E-PK-37
• E-PK-38
• E-PK-4
• E-PK-40
• E-PK-41
• E-PK-42
• E-PK-43
• E-PK-45
• E-PK-46
• E-PK-47
• E-PK-48
• E-PK-49
• E-PK-50
• E-PK-51
• E-PK-52
• E-PK-53
• E-PK-55
• E-PK-56
• E-PK-58
• E-PK-59
• E-PK-6
• E-PK-60
• E-PK-61
• E-PK-62
• E-PK-63
• E-PK-64
• E-PK-65
• E-PK-66
• E-PK-69
• E-PK-7
• E-PK-70
• E-PK-71
• E-PK-72
• E-PK-73
• E-PK-74
• E-PK-75
• E-PK-76
• E-PK-77
• F-PK-1
• F-PK-10
• F-PK-11
• F-PK-3
• F-PK-36
• F-PK-39
• F-PK-44
• F-PK-54
• F-PK-57
• F-PK-68
• F-PK-9
• W-PK-67