Access edb_value from components using a method instead of a property.

[MaxJPRey]

Replace _edb_value protected property by a protected method _get_edb_value().
Codacy tool was raising mentioning that _edb_value was not callable. The property was returning a function object and using it to call an edb method.
Even though it was valid, it could be confusing when maintaining code.

Fix #911

[codecov]

Codecov Report

Merging #938 (db2f706) into main (dbe38ad) will increase coverage by 0.07%.
The diff coverage is 89.65%.

@@            Coverage Diff             @@
##             main     #938      +/-   ##
==========================================
+ Coverage   80.45%   80.53%   +0.07%     
==========================================
  Files         128      128              
  Lines       37777    37855      +78     
==========================================
+ Hits        30394    30486      +92     
+ Misses       7383     7369      -14     

[maxcapodi78]

@MaxJPRey I like the approach but we should standardize in edb_core classes. can you replace it in any classes in edb_core the property with the method?

[MaxJPRey]

@MaxJPRey I like the approach but we should standardize in edb_core classes. can you replace it in any classes in edb_core the property with the method?

Sure @maxcapodi78 I will do it.

[maxcapodi78]

LGTM