Common: Rename configuration package to agent_configuration

[VakarisZ]

What does this PR do?

Renames configuration to agent_configuration as part of #2004

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by running UT's

• If applicable, add screenshots or log transcripts of the feature working

[codecov]

Codecov Report

Merging #2116 (c4aea69) into develop (4d3fb03) will not change coverage.
The diff coverage is 85.71%.

@@           Coverage Diff            @@
##           develop    #2116   +/-   ##
========================================
  Coverage    56.55%   56.55%           
========================================
  Files          485      485           
  Lines        13198    13198           
========================================
  Hits          7464     7464           
  Misses        5734     5734           

Impacted Files	Coverage Δ
monkey/common/agent_configuration/__init__.py	100.00% <ø> (ø)
.../common/agent_configuration/agent_configuration.py	100.00% <ø> (ø)
...t_configuration/agent_sub_configuration_schemas.py	100.00% <ø> (ø)
...on/agent_configuration/agent_sub_configurations.py	100.00% <ø> (ø)
...agent_configuration/default_agent_configuration.py	100.00% <ø> (ø)
monkey/monkey_island/cc/services/initialize.py	0.00% <0.00%> (ø)
monkey/infection_monkey/i_control_channel.py	85.71% <100.00%> (ø)
monkey/infection_monkey/master/automated_master.py	84.44% <100.00%> (ø)
monkey/infection_monkey/master/control_channel.py	36.36% <100.00%> (ø)
monkey/infection_monkey/master/exploiter.py	96.10% <100.00%> (ø)
... and 13 more

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[shreyamalviya]

You missed the imports in the blackbox tests.