Added snap-plugin-collector-cpu in different versions (1,2,3)

[IzabellaRaulin]

and added task manifestcpu-file.json

• snap-plugin-collector-cpu1 does not have some of metrics (see below output form snapctl metric list),
• snap-plugin-collector-cpu2 exposes wrong values (zeroed) of cumulative metrics (see metrics with prefix intel/procfs/cpu/all),
• snap-plugin-collector-cpu3 exposes all metrics and their values are valid too (this is the latest version).

# snapctl metric list
NAMESPACE                                        VERSIONS
/intel/procfs/cpu/0/active_jiffies               2,3
/intel/procfs/cpu/0/active_percentage            2,3
/intel/procfs/cpu/0/guest_jiffies                1,2,3
/intel/procfs/cpu/0/guest_nice_jiffies           1,2,3
/intel/procfs/cpu/0/guest_nice_percentage        1,2,3
/intel/procfs/cpu/0/guest_percentage             1,2,3
/intel/procfs/cpu/0/idle_jiffies                 1,2,3
/intel/procfs/cpu/0/idle_percentage              1,2,3
/intel/procfs/cpu/0/iowait_jiffies               1,2,3
/intel/procfs/cpu/0/iowait_percentage            1,2,3
/intel/procfs/cpu/0/irq_jiffies                  1,2,3
/intel/procfs/cpu/0/irq_percentage               1,2,3
/intel/procfs/cpu/0/nice_jiffies                 1,2,3
/intel/procfs/cpu/0/nice_percentage              1,2,3
/intel/procfs/cpu/0/softirq_jiffies              1,2,3
/intel/procfs/cpu/0/softirq_percentage           1,2,3
/intel/procfs/cpu/0/steal_jiffies                1,2,3
/intel/procfs/cpu/0/steal_percentage             1,2,3
/intel/procfs/cpu/0/system_jiffies               1,2,3
/intel/procfs/cpu/0/system_percentage            1,2,3
/intel/procfs/cpu/0/user_jiffies                 1,2,3
/intel/procfs/cpu/0/user_percentage              1,2,3
/intel/procfs/cpu/0/utilization_jiffies          2,3
/intel/procfs/cpu/0/utilization_percentage       2,3
/intel/procfs/cpu/all/active_jiffies             2,3
/intel/procfs/cpu/all/active_percentage          2,3
/intel/procfs/cpu/all/guest_jiffies              1,2,3
/intel/procfs/cpu/all/guest_nice_jiffies         1,2,3
/intel/procfs/cpu/all/guest_nice_percentage      1,2,3
/intel/procfs/cpu/all/guest_percentage           1,2,3
/intel/procfs/cpu/all/idle_jiffies               1,2,3
/intel/procfs/cpu/all/idle_percentage            1,2,3
/intel/procfs/cpu/all/iowait_jiffies             1,2,3
/intel/procfs/cpu/all/iowait_percentage          1,2,3
/intel/procfs/cpu/all/irq_jiffies                1,2,3
/intel/procfs/cpu/all/irq_percentage             1,2,3
/intel/procfs/cpu/all/nice_jiffies               1,2,3
/intel/procfs/cpu/all/nice_percentage            1,2,3
/intel/procfs/cpu/all/softirq_jiffies            1,2,3
/intel/procfs/cpu/all/softirq_percentage         1,2,3
/intel/procfs/cpu/all/steal_jiffies              1,2,3
/intel/procfs/cpu/all/steal_percentage           1,2,3
/intel/procfs/cpu/all/system_jiffies             1,2,3
/intel/procfs/cpu/all/system_percentage          1,2,3
/intel/procfs/cpu/all/user_jiffies               1,2,3
/intel/procfs/cpu/all/user_percentage            1,2,3
/intel/procfs/cpu/all/utilization_jiffies        2,3
/intel/procfs/cpu/all/utilization_percentage     2,3
/intel/procfs/cpu/mock/version_info              1,2,3