.travis.yml: remembers the coverage only for the .should_get tests

It seems than now only one test suite can be reported for coverage (and further displayed on coveralls.io).

.travis.yml

@@ -17,11 +17,11 @@ script:
   - g++ --version
   ###
   - echo '"Build..."' && echo -en 'travis_fold:start:script.build\\r'
-  - make COVERAGE=1
+  - make
   - echo -en 'travis_fold:end:script.build\\r'
   ###
   - echo '"Tests, Algo (unit)..."'  && echo -en 'travis_fold:start:script.test-algo-unit\\r'
-  - make COVERAGE=1 unit
+  - make unit
   - echo -en 'travis_fold:end:script.test-algo-unit\\r'
   ###
   - echo '"Tests, Algo (functional, .should_get)..."'  && echo -en 'travis_fold:start:script.test-algo-functional\\r'
@@ -29,7 +29,7 @@ script:
   - echo -en 'travis_fold:end:script.test-algo-functional\\r'
   ###
   - echo '"Tests, Algo (functional, .should-vdj.fa)..."'  && echo -en 'travis_fold:start:script.test-algo-functional-vdj\\r'
-  - make COVERAGE=1 shouldvdj
+  - make shouldvdj
   - echo -en 'travis_fold:end:script.test-algo-functional-vdj\\r'
   ###
   - echo '"Tests, Tools..."'  && echo -en 'travis_fold:start:script.test-tools\\r'