No default RDD name for ones created by sc.textFile

Having a default name for an RDD created from a file is very handy.
The feature was first added at commit: 7b877b2 but was later removed (probably by mistake) at commit: fc8b581.
This change sets the default path of RDDs created via sc.textFile(...) to the path argument.

Here is the symptom:

Using spark-1.5.2-bin-hadoop2.6:
scala> sc.textFile("/home/root/.bashrc").name
res5: String = null

scala> sc.binaryFiles("/home/root/.bashrc").name
res6: String = /home/root/.bashrc

while using Spark 1.3.1:
scala> sc.textFile("/home/root/.bashrc").name
res0: String = /home/root/.bashrc

scala> sc.binaryFiles("/home/root/.bashrc").name
res1: String = /home/root/.bashrc