[SPARK-13429][MLLIB] Unify Logistic Regression convergence tolerance of ML & MLlib

## What changes were proposed in this pull request?
In order to provide better and consistent result, let's change the default value of MLlib ```LogisticRegressionWithLBFGS convergenceTol``` from ```1E-4``` to ```1E-6``` which will be equal to ML ```LogisticRegression```.
cc dbtsai
## How was the this patch tested?
unit tests

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #11299 from yanboliang/spark-13429.