update Wegamma spruce line and add three W rare decay HLT2 lines

Two major updates:

• Fixed the W(e\gamma)+\gamma spruce line: as discussed in Issue #532 (closed)
• Add three HLT2 trigger lines for W rare decay searches:
  • W^+\to D_s^+ \mu^+ \mu^-
  • W^+\to \pi^+ \mu^+ \mu^-
  • W^+\to D_s^+ \phi(1020) \mu^+ \mu^-

In the rate test of HLT2 triggers, the filtered minbias is used, the rates are tested as 0:

Line: Hlt2WZRareJPsiPhiDspDecision Incl: 0.0 +/- 0.0 kHz, Excl: 0.0 +/- 0.0 kHz
Line: Hlt2WZRareDiMuonDspDecision Incl: 0.0 +/- 0.0 kHz, Excl: 0.0 +/- 0.0 kHz
Line: Hlt2WZRareDiMuonPionDecision Incl: 0.0 +/- 0.0 kHz, Excl: 0.0 +/- 0.0 kHz

For the filtered minbias, which is approximately 1 MHz of rate, so rates of the Hlt2 lines have an upper bound of ~10HZ or less.

• < 1/100,000 is approximately 10Hz or less