Adds an option to disable the data collector

[iainmckay]

We need a way to disable the data collector as during development our app regularly runs out of memory because of how much data it collects. In our particular case we use a lot of annotations and doctrine is caching those in memcache. We end up running over our memory limit.

We don't get much value from the data collector so the option to disable solves the problem for us.

[Nyholm]

Thank you. I like this.
Can you make sure to fix the style issue?

[codecov-io]

Codecov Report

Merging #73 into master will increase coverage by 0.08%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master     #73      +/-   ##
===========================================
+ Coverage     41.51%   41.6%   +0.08%     
- Complexity      181     183       +2     
===========================================
  Files            20      20              
  Lines           737     762      +25     
===========================================
+ Hits            306     317      +11     
- Misses          431     445      +14

Impacted Files	Coverage Δ	Complexity Δ
src/DependencyInjection/Configuration.php	97.76% <100%> (+0.14%)	11 <1> (+1)	⬆️
src/DependencyInjection/CacheExtension.php	93.5% <100%> (+0.26%)	19 <0> (+1)	⬆️
src/Cache/Recording/CachePool.php	13.33% <0%> (-2.06%)	22% <0%> (ø)
src/Cache/Recording/TaggablePool.php	0% <0%> (ø)	2% <0%> (ø)	⬇️

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[iainmckay]

Fixed

[Nyholm]

Thank you