Fix LDAPFilter::ToString seg fault

[jeffdiclemente]

Fixes #232

Add test cases to increase code coverage.

Signed-off-by: The MathWorks, Inc. Roy.Lurie@mathworks.com

[codecov-io]

Codecov Report

Merging #233 into development will increase coverage by 0.02%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##           development     #233      +/-   ##
===============================================
+ Coverage        82.82%   82.84%   +0.02%     
===============================================
  Files              186      187       +1     
  Lines            13196    13166      -30     
===============================================
- Hits             10929    10908      -21     
+ Misses            2267     2258       -9

Impacted Files	Coverage Δ
framework/src/util/LDAPFilter.cpp	98.36% <100%> (+13.11%)	⬆️
framework/test/gtest/LDAPFilterTest.cpp	100% <100%> (ø)
framework/include/cppmicroservices/Any.h	95.58% <0%> (-1.94%)	⬇️
framework/test/driver/LDAPFilterTest.cpp	82.95% <0%> (-0.05%)	⬇️
framework/include/cppmicroservices/SharedData.h	96.72% <0%> (+1.63%)	⬆️
framework/include/cppmicroservices/AnyMap.h	60% <0%> (+20%)	⬆️

[ksubramz]

Jeff, just a comment to tell you that I am working on test cases to improve code coverage of all the LDAP-related files. https://github.com/CppMicroServices/CppMicroServices/tree/codecov-util . There seems to be some overlap between tests, which is fine.

Maybe the main thing to reconcile is my file is named LDAPTest.cpp because it covers all LDAP classes and your file is named LDAPFilterTest.cpp (because it pertains only to LDAPFilter). Maybe this is fine too?