Try disabling tests on 7.10.3 (takes too long to build)

Author: dolio

.travis.yml

@@ -25,7 +25,7 @@ matrix:
     - env: CABALVER=1.18 GHCVER=7.8.4
       compiler: ": #GHC 7.8.4"
       addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}
-    - env: CABALVER=1.22 GHCVER=7.10.3
+    - env: CABALVER=1.22 GHCVER=7.10.3 TESTS='--disable-tests'
       compiler: ": #GHC 7.10.3"
       addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}
     - env: CABALVER=1.24 GHCVER=8.0.1
@@ -52,7 +52,7 @@ install:
    fi
  - travis_retry cabal update -v
  - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
- - cabal install --only-dependencies --enable-tests --enable-benchmarks --dry -v > installplan.txt
+ - cabal install --only-dependencies --enable-tests $TESTS --enable-benchmarks --dry -v > installplan.txt
  - sed -i -e '1,/^Resolving /d' installplan.txt; cat installplan.txt
 
 # check whether current requested install-plan matches cached package-db snapshot
@@ -84,7 +84,7 @@ script:
  - if [ -f configure.ac ]; then autoreconf -i; fi
  - cabal configure --enable-tests --enable-benchmarks -v2  # -v2 provides useful information for debugging
  - cabal build   # this builds all libraries and executables (including tests/benchmarks)
- - cabal test
+ - if [ "$TESTS" = '--disable-tests' ]; then cabal test; fi
 # - cabal check
  - cabal sdist   # tests that a source-distribution can be generated