[ci] sort package installation (#1761)

* sort package installation

.appveyor.yml

@@ -31,7 +31,7 @@ install:
   - ps: $env:LGB_VER = (Get-Content VERSION.txt).trim()
   - conda config --set always_yes yes --set changeps1 no
   - conda update -q conda
-  - conda create -q -n test-env python=%PYTHON_VERSION% numpy nose scipy scikit-learn pandas matplotlib python-graphviz pytest joblib
+  - conda create -q -n test-env python=%PYTHON_VERSION% joblib matplotlib nose numpy pandas pytest python-graphviz scikit-learn scipy
   - activate test-env
 
 build_script:

.ci/test.sh

@@ -61,7 +61,7 @@ if [[ $TASK == "if-else" ]]; then
     exit 0
 fi
 
-conda install -q -y -n $CONDA_ENV numpy nose scipy scikit-learn pandas matplotlib python-graphviz pytest
+conda install -q -y -n $CONDA_ENV matplotlib nose numpy pandas pytest python-graphviz scikit-learn scipy
 
 if [[ $OS_NAME == "macos" ]] && [[ $COMPILER == "clang" ]]; then
     sudo ln -sf `ls -d "$(brew --cellar libomp)"/*/lib`/* $CONDA_PREFIX/lib || exit -1  # fix "OMP: Error #15: Initializing libiomp5.dylib, but found libomp.dylib already initialized." (OpenMP library conflict due to conda's MKL)

.vsts-ci.yml

@@ -148,7 +148,7 @@ jobs:
       createCustomEnvironment: true
       updateConda: true
       environmentName: $(CONDA_ENV)
-      packageSpecs: 'python=$(PYTHON_VERSION) numpy nose matplotlib python-graphviz pytest scipy scikit-learn pandas'
+      packageSpecs: 'python=$(PYTHON_VERSION) matplotlib nose numpy pandas pytest python-graphviz scikit-learn scipy'
       createOptions: '-q'
   - powershell: $(Build.SourcesDirectory)/.ci/test_windows.ps1
     displayName: Test