[SPARK-9141] [SQL] Remove project collapsing from DataFrame API

Currently we collapse successive projections that are added by `withColumn`.  However, this optimization violates the constraint that adding nodes to a plan will never change its analyzed form and thus breaks caching.  Instead of doing early optimization, in this PR I just fix some low-hanging slowness in the analyzer.  In particular, I add a mechanism for skipping already analyzed subplans, `resolveOperators` and `resolveExpression`.  Since trees are generally immutable after construction, it's safe to annotate a plan as already analyzed as any transformation will create a new tree with this bit no longer set.

Together these result in a faster analyzer than before, even with added timing instrumentation.

```
Original Code
[info] 3430ms
[info] 2205ms
[info] 1973ms
[info] 1982ms
[info] 1916ms

Without Project Collapsing in DataFrame
[info] 44610ms
[info] 45977ms
[info] 46423ms
[info] 46306ms
[info] 54723ms

With analyzer optimizations
[info] 6394ms
[info] 4630ms
[info] 4388ms
[info] 4093ms
[info] 4113ms

With resolveOperators
[info] 2495ms
[info] 1380ms
[info] 1685ms
[info] 1414ms
[info] 1240ms
```

Author: Michael Armbrust <michael@databricks.com>

Closes #7920 from marmbrus/withColumnCache and squashes the following commits:

2145031 [Michael Armbrust] fix hive udfs tests
5a5a525 [Michael Armbrust] remove wrong comment
7a507d5 [Michael Armbrust] style
b59d710 [Michael Armbrust] revert small change
1fa5949 [Michael Armbrust] move logic into LogicalPlan, add tests
0e2cb43 [Michael Armbrust] Merge remote-tracking branch 'origin/master' into withColumnCache
c926e24 [Michael Armbrust] naming
e593a2d [Michael Armbrust] style
f5a929e [Michael Armbrust] [SPARK-9141][SQL] Remove project collapsing from DataFrame API
38b1c83 [Michael Armbrust] WIP

0 files changed, 0 insertions, 0 deletions